Functions in Programming

The logical meaning of function is some particular task that is the main working of a thing, that a thing performs some particular work. In programming world some of the main workings of software are assembled in particular functions.  Functions are of most importance in programming in any language whether php, java, Dot Net etc.  Functions can be very simple like the addition and subtraction with just few lines of code and they can be very long with vast lines of codes. So the basic definition of function is Function is a block of code that is used to perform some specific task.

Uses of functions are as follows

1)-By making functions we reduce the complexity of the program.

2)-In functions we have blocked the code in function, and that code can be reused again and again whenever that specific task need to be performed, just by calling that function.

3)- It saves a lot of time in programming, and it reduces the redundancy of code.

Examples of functions in php

<?php

Function addition ($a, $b)

{

$result = $a+$b;

Echo “addition result is”. $result;

}

Function subtraction($a, $b)

{

$result=$a-$b;

Echo “subtraction result is”. $result;

}

Function multiplication($a, $b)

{

$result=$a*$b;

Echo “multiplication result is”. $result;

}

Function division($a, $b)

{

$result=$a/$b;

Echo “division result is”. $result;

}

Function modulus($a, $b)

{

$result=$a%$b;

Echo “modulus result is”. $result;

}

addition (10,20);

subtraction (20,10);

multiplication (10,20);

division(20,10);

modulus(20,10);

?>

Output of above program will be as follows:-

Addition result is 30

Subtraction result is 10

Multiplication result is 200

Division result is 2

Modulus result is 0

The above program is a very simplest example of functions in which we have created simple mathematical functions and whenever in a program we require the mathematical calculation of two numbers we can simply call these functions.

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1)-java

2)-Dot-Net

3)-php

4)-SAP

5)-Embedded

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