Categories: All Variables and Constants  String manipulation  Builtin functions  Input and output  Arrays  Conditional logic  Repetition / Iteration  Functions / Procedures 

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This website aims to give a quick reference for VB.NET, Python and C# and pseudocode and is aimed primarily at teachers & students working towards a GCSE or A Level in Computer Science

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Skill
Description
VB.NET
Python
C#
Create and use a function with parameters
   

A function is like a procedure except that it always returns a value.

Parameters are variables that allow you to send data to the function to customise what it does or how it works. 

The parameters are the variables named in brackets after the function name.

This return value is calculated when the function is called and can be saved into a variable or used later in the program.

Both functions and procedures are sections of code that have been given a name, which can be re-used to do something useful.

This example defines a function which will generate and return a random number. It has two parameters which allow you to set the minimum and maximum number the random number will be between.  

This function is called to choose a random number between 10 and 20 and then called again to choose a random number between 50 and 100. Both numbers are returned and saved into separate variables.

import random # define the function def choose_random_between(min, max): print(random.randint(min, max)) # call the function first_number = choose_random_between(10, 20) second_number = choose_random_between(50, 100)
// define the function int showRandomBetween(int min, int max) { Random r = new Random(); int number = r.Next(min, max); return number; } // call the function int firstNumber = showRandomBetween(10, 20); int secondNumber = showRandomBetween(50, 100);

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