Search results
Top results related to imperative programming languages example sentences
Top Answer
Answered Aug 22, 2017 · 189 votes
Definition: An imperative language uses a sequence of statements to determine how to reach a certain goal. These statements are said to change the state of the program as each one is executed in turn.
Examples: Java is an imperative language. For example, a program can be created to add a series of numbers:
int total = 0; int number1 = 5; int number2 = 10; int number3 = 15; total = number1 + number2 + number3;
Each statement changes the state of the program, from assigning values to each variable to the final addition of those values. Using a sequence of five statements the program is explicitly told how to add the numbers 5, 10 and 15 together.
Functional languages: The functional programming paradigm was explicitly created to support a pure functional approach to problem solving. Functional programming is a form of declarative programming.
Advantages of Pure Functions: The primary reason to implement functional transformations as pure functions is that pure functions are composable: that is, self-contained and stateless. These characteristics bring a number of benefits, including the following: Increased readability and maintainability. This is because each function is designed to accomplish a specific task given its arguments. The function does not rely on any external state.
Easier reiterative development. Because the code is easier to refactor, changes to design are often easier to implement. For example, suppose you write a complicated transformation, and then realize that some code is repeated several times in the transformation. If you refactor through a pure method, you can call your pure method at will without worrying about side effects.
Easier testing and debugging. Because pure functions can more easily be tested in isolation, you can write test code that calls the pure function with typical values, valid edge cases, and invalid edge cases.
For OOP People or Imperative languages:
Object-oriented languages are good when you have a fixed set of operations on things and as your code evolves, you primarily add new things. This can be accomplished by adding new classes which implement existing methods and the existing classes are left alone.
Functional languages are good when you have a fixed set of things and as your code evolves, you primarily add new operations on existing things. This can be accomplished by adding new functions which compute with existing data types and the existing functions are left alone.
Cons:
It depends on the user requirements to choose the way of programming, so there is harm only when users don’t choose the proper way.
When evolution goes the wrong way, you have problems:
- Adding a new operation to an object-oriented program may require editing many class definitions to add a new method
- Adding a new kind of thing to a functional program may require editing many function definitions to add a new case.
Other Answers
Answered Jul 24, 2013 · 267 votes
Here is the difference:
Imperative:
- Start
- Turn on your shoes size 9 1/2.
- Make room in your pocket to keep an array[7] of keys.
- Put the keys in the room for the keys in the pocket.
- Enter garage.
- Open garage.
- Enter Car.
... and so on and on ...
- Put the milk in the refrigerator.
- Stop.
Declarative, whereof functional is a subcategory:
- Milk is a healthy drink, unless you have problems digesting lactose.
- Usually, one stores milk in a refrigerator.
- A refrigerator is a box that keeps the things in it cool.
- A store is a place where items are sold.
- By "selling" we mean the exchange of things for money.
- Also, the exchange of money for things is called "buying".
... and so on and on ...
- Make sure we have milk in the refrigerator (when we need it - for lazy functional languages).
Summary: In imperative languages you tell the computer how to change bits, bytes and words in it's memory and in what order. In functional ones, we tell the computer what things, actions etc. are. For example, we say that the factorial of 0 is 1, and the factorial of every other natural number is the product of that number and the factorial of its predecessor. We don't say: To compute the factorial of n, reserve a memory region and store 1 there, then multiply the number in that memory region with the numbers 2 to n and store the result at the same place, and at the end, the memory region will contain the factorial.
Other Answers
Answered Nov 03, 2020 · 22 votes
Most modern languages are in varying degree both imperative and functional but to better understand functional programming, it will be best to take an example of pure functional language like Haskell in contrast of imperative code in not so functional language like java/C#. I believe it is always easy to explain by example, so below is one.
Functional programming: calculate factorial of n i.e n! i.e n x (n-1) x (n-2) x ...x 2 X 1
-- | Haskell comment goes like-- | below 2 lines is code to calculate factorial and 3rd is it's execution factorial 0 = 1factorial n = n * factorial (n - 1)factorial 3-- | for brevity let's call factorial as f; And x => y shows order execution left to right-- | above executes as := f(3) as 3 x f(2) => f(2) as 2 x f(1) => f(1) as 1 x f(0) => f(0) as 1 -- | 3 x (2 x (1 x (1)) = 6
Notice that Haskel allows function overloading to the level of argument value. Now below is example of imperative code in increasing degree of imperativeness:
//somewhat functional wayfunction factorial(n) { if(n < 1) { return 1; } return n * factorial(n-1); }factorial(3);//somewhat more imperative wayfunction imperativeFactor(n) { int f = 1; for(int i = 1; i <= n; i++) { f = f * i; } return f;}
This read can be a good reference to understand that how imperative code focus more on how part, state of machine (i in for loop), order of execution, flow control.
The later example can be seen as java/C# lang code roughly and first part as limitation of the language itself in contrast of Haskell to overload the function by value (zero) and hence can be said it is not purist functional language, on the other hand you can say it support functional prog. to some extent.
Disclosure: none of the above code is tested/executed but hopefully should be good enough to convey the concept; also I would appreciate comments for any such correction :)
1/5
Top Answer
Answered Jul 23, 2010 · 22 votes
Erlang, as described by Wikipedia:
It was designed by Ericsson to support distributed, fault-tolerant, soft-real-time, non-stop applications.
You might also want to read the Distributed Erlang section of their manual.
However, note that Erlang is a functional language and will require a much different paradigm of thought as compared to C++.
2/5
Top Answer
Answered Mar 17, 2011 · 9 votes
While it is possible to write a language implementation in assembly, for most languages it is not really advisable to do so for a variety of reasons: assembly code is notoriously difficult to develop and maintain, and it is by definition not portable.
That said, some languages are significantly easier to produce implementations for:
- It is very easy to produce an assembly implementation for Brainfuck
- Forth has a number of implementations in assembly, which is why it is used in the firmware of several non-PC workstations. You can find some assembly implementations for various platforms here.
- Many BASIC interpretters have been written in assembly - in fact that was probably true for most BASIC implementations in the various home computers of the late '70s and early '80s. Some can be found here.
3/5
Top Answer
Answered Dec 04, 2009 · 12 votes
You could reverse your question : what toolkits are there, and which languauges do they support?
For Example GTK : (from wikipedia)
C GTK+ C++ gtkmm Ruby ruby-gtk2 Python PyGTK Java java-gnome .NET Gtk# PHP PHP-GTK Perl Gtk2-Perl
You can find support for many languages if you explore these other widget toolkits :
Juce — An extensive cross-platform UI toolkitFLTK — A light, cross platform, non-native widget toolkitFOX toolkit — A fast, open source, cross-platform widget toolkitGTK+ — The GIMP toolkit, a widget toolkit used by GNOME applicationsIUP_(software) -- IUP cross platform static/dynamic library C/LUA, Lua (MIT) licenceJX Application FrameworkMicrosoft Foundation Class - The most commonly used widgeting toolkit for Windows.MotifObject Windows Library & OWLNextQt — A widget toolkit used by KDEStandard Widget Toolkit — SWT for JavaSwing — Java widget toolkitTk — Toolkit part of the Tcl - project and often used by Perl and Python programmersUltimate++Visual Component LibrarywxWidgets — A free widget toolkitXForms
Other Answers
Answered Jul 24, 2013 · 267 votes
Here is the difference:
Imperative:
- Start
- Turn on your shoes size 9 1/2.
- Make room in your pocket to keep an array[7] of keys.
- Put the keys in the room for the keys in the pocket.
- Enter garage.
- Open garage.
- Enter Car.
... and so on and on ...
- Put the milk in the refrigerator.
- Stop.
Declarative, whereof functional is a subcategory:
- Milk is a healthy drink, unless you have problems digesting lactose.
- Usually, one stores milk in a refrigerator.
- A refrigerator is a box that keeps the things in it cool.
- A store is a place where items are sold.
- By "selling" we mean the exchange of things for money.
- Also, the exchange of money for things is called "buying".
... and so on and on ...
- Make sure we have milk in the refrigerator (when we need it - for lazy functional languages).
Summary: In imperative languages you tell the computer how to change bits, bytes and words in it's memory and in what order. In functional ones, we tell the computer what things, actions etc. are. For example, we say that the factorial of 0 is 1, and the factorial of every other natural number is the product of that number and the factorial of its predecessor. We don't say: To compute the factorial of n, reserve a memory region and store 1 there, then multiply the number in that memory region with the numbers 2 to n and store the result at the same place, and at the end, the memory region will contain the factorial.
Other Answers
Answered Nov 03, 2020 · 22 votes
Most modern languages are in varying degree both imperative and functional but to better understand functional programming, it will be best to take an example of pure functional language like Haskell in contrast of imperative code in not so functional language like java/C#. I believe it is always easy to explain by example, so below is one.
Functional programming: calculate factorial of n i.e n! i.e n x (n-1) x (n-2) x ...x 2 X 1
-- | Haskell comment goes like-- | below 2 lines is code to calculate factorial and 3rd is it's execution -factorial 0 = 1factorial n = n * factorial (n - 1)factorial 3-- | for brevity let's call factorial as f; And x => y shows order execution left to right-- | above executes as := f(3) as 3 x f(2) => f(2) as 2 x f(1) => f(1) as 1 x f(0) => f(0) as 1 -- | 3 x (2 x (1 x (1)) = 6
Notice that Haskel allows function overloading to the level of argument value. Now below is example of imperative code in increasing degree of imperativeness:
//somewhat functional wayfunction factorial(n) { if(n < 1) { return 1; } return n * factorial(n-1); }factorial(3);//somewhat more imperative wayfunction imperativeFactor(n) { int f = 1; for(int i = 1; i <= n; i++) { f = f * i; } return f;}
This read can be a good reference to understand that how imperative code focus more on how part, state of machine (i in for loop), order of execution, flow control.
The later example can be seen as java/C# lang code roughly and first part as limitation of the language itself in contrast of Haskell to overload the function by value (zero) and hence can be said it is not purist functional language, on the other hand you can say it support functional prog. to some extent.
Disclosure: none of the above code is tested/executed but hopefully should be good enough to convey the concept; also I would appreciate comments for any such correction :)
4/5
Top Answer
Answered May 23, 2017 · 2 votes
MS-MPI, based on MPICH with modifications, provides the MPI-standard C, C++ and Fortran interfaces.
If you want Python (or Rust, or Julia, or whatever language you like), there are good 3rd party packages for that. MPI4PY ( is an excellent Python library for MPI, and works with lots of MPI implementations. See this question if you get stuck ( How to successfully compile mpi4py using MS HPC Server 2008 R2's MPI stack? ) but it sounds like nowadays mpi4py "just works".
Legos make a good analogy here. MPI (any implementation) is like a big base plate. Maybe it's green, red, blue, but it's a standard foundation for "stuff". You don't have to use MS-MPI. you can use anything. mpi4py is a library. It provides the python routines and makes C mpi calls for you under the covers. mpi4py doesn't care (too much) about if it's plugged into a green base plate or a red one. the standard API allows this interoperability
In your case, you want to make python calls. mpi4py will provide you python and make the MS-MPI calls for you. mpi4py by itself is kind of useless. It needs an MPI library. MS-MPI is a good MPI library for your platform. You'll need to set up MS-MPI first, then set up mpi4py. If you want to one day take your code somewhere else, you might need a different MPI library. Good news: the standard means swapping out MPI libraries (because you want to try something new or because you went to a different platform) is easy to do
5/5
People also ask
Which programming languages are able to implement imperative programming?
- Programming languages which majorly able to implement imperative programming are Java, C, C++, C#, Ruby, Matlab, Python and R. It is important to note that any programming language is not specific to a single paradigm but also incorporates some other paradigms as well.
What is Imperative Programming? - GeeksforGeeks
www.geeksforgeeks.org/what-is-imperative-programming/What does imperative mean in programming?
- In English, “imperative” is a synonym of “command”—it comes from the same root as “emperor”—and that’s the core of its meaning in programming languages as well. An imperative language is a language in which the fundamental behavior is described by imperatives, i.e., commands, in sequence.
CS442 Module 7: Imperative Programming - University of Waterloo
student.cs.uwaterloo.ca/~cs442/W23/notes/webnotes/Module-7/What is the difference between imperative and declarative programming?
- By contrast, in declarative programming, the desired result (what) is described directly. This becomes clearer when using a cooking analogy for illustration: imperative languages provide recipes; declarative languages contribute photos of the finished meal.
Imperative programming: Advantages & disadvantages of the paradig…
www.ionos.com/digitalguide/websites/web-development/imperative-programming/What are the key features of imperative programming?
- In imperative programming, computer receives the series of commands in steps from program to achieve the result. There are some important key features which belongs to the imperative programming. Control Flow: Imperative programming is based on control structures, assignment variables and I/O (input/output) statements.
What is Imperative Programming? - GeeksforGeeks
www.geeksforgeeks.org/what-is-imperative-programming/www.geeksforgeeks.org › what-is-imperative-programmingWhat is Imperative Programming? - GeeksforGeeks
www.geeksforgeeks.org › what-is-imperative-programmingApr 25, 2024 · Programming languages which majorly able to implement imperative programming are Java, C, C++, C#, Ruby, Matlab, Python and R. It is important to note that any programming language is not specific to a single paradigm but also incorporates some other paradigms as well. Programming Languages of Imperative Paradigms.
en.wikipedia.org › wiki › Imperative_programmingImperative programming - Wikipedia
en.wikipedia.org › wiki › Imperative_programmingExamples. Fortran. COBOL. Algol. Basic. C++. See also. Notes. References. Imperative programming. In computer science, imperative programming is a programming paradigm of software that uses statements that change a program's state.
www.ionos.com › imperative-programmingImperative programming: Advantages & disadvantages of the ...
www.ionos.com › imperative-programmingMay 21, 2021 · These are the best-known imperative programming languages: Fortran; Java; Pascal; ALGOL; C; C#; C++; Assembler; BASIC; COBOL; Python; Ruby; The different imperative programming languages can, in turn, be assigned to three further subordinate programming styles – structured, procedural, and modular.
www2.seas.gwu.edu › imperative_languagesImperative Programming Languages (IPL)
www2.seas.gwu.edu › imperative_languagesExamples of imperative languages: • FORTRAN, Algol, COBOL, Pascal, C (and to some extent C++), BASIC, Ada - and many. PL/I. more. PL/I (1963-5): was one of the few languages that attempted to be a general purpose language, rather than aiming at a particular category of programming.
- 26KB
- 15
student.cs.uwaterloo.ca › ~cs442 › W23CS442 Module 7: Imperative Programming - University of Waterloo
student.cs.uwaterloo.ca › ~cs442 › W23Most of the most popular programming languages in the world are imperative: C, C++, Java, JavaScript, Python, etc. Smalltalk, which you’ve been using in this course, is also imperative, although it’s an unusual example.
cio-wiki.org › wiki › Imperative_ProgrammingImperative Programming - CIO Wiki
cio-wiki.org › wiki › Imperative_ProgrammingApr 7, 2024 · Contents. 1 What is Imperative Programming? 2 Key Characteristics of Imperative Programming. 3 Examples of Imperative Programming Languages. 4 Comparison with Other Paradigms. 5 Advantages of Imperative Programming. 6 Disadvantages of Imperative Programming. 7 Use Cases for Imperative Programming. 8 Conclusion.
learncodingusa.com › imperative-programming-realUsing Imperative Programming: Real-world Examples
learncodingusa.com › imperative-programming-realOct 10, 2023 · Nicholas Idoko 14 min read. Last Updated on October 10, 2023. Introduction. Imperative programming is a programming paradigm where statements are used to change the program’s state. It is an essential concept in computer programming, allowing developers to create step-by-step instructions to accomplish tasks.
Searches related to imperative programming languages example sentences
