PHP

MATHEMATICAL OPERATORS IN PHP

PHP can do mathematical operations on numbers.

Example:

$total= 1 + 2;

echo $total; //outputs 3

PHP can also do mathematical operations on variables that contain numbers.

Example:

$firstNumber=5;

$total= $firstNumber + 2;

echo $total; //outputs 7

Example:

$firstNumber=5;
$secondNumber=18;
$total= $firstNumber + $secondNumber;

echo $total; //outputs 23

PHP can perform addition (as above), subtraction, division, multiplication and modulus.

SUBTRACTION:

Example:

$total= 10 - 1;

echo $total; //outputs 9

Example:

$firstNumber=5;

$total= $firstNumber - 2;

echo $total; //outputs 3

Example:

$firstNumber=5;
$secondNumber=18;
$total= $firstNumber - $secondNumber;

echo $total; //outputs -13

DIVISION:

Example:

$total= 10 / 2;

echo $total; //outputs 5

Example:

$firstNumber=6;

$total= $firstNumber / 2;

echo $total; //outputs 3

Example:

$firstNumber=20;
$secondNumber=10;

$total= $firstNumber / $secondNumber;

echo $total; //outputs 2

MULTIPLICATION:

Example:

$total= 7 * 2;

echo $total; //outputs 14

Example:

$firstNumber=6;

$total= $firstNumber * 100;

echo $total; //outputs 600

Example:

$firstNumber=20;
$secondNumber=10;

$total= $firstNumber * $secondNumber;

echo $total; //outputs 200

MODULUS:

Modulus is the remainder after a division. The operator % is used.

Example:

$total= 7 % 2;

echo $total; //outputs 1

1 is calculated as follows:

2 can go into 7 three times whole. Therefore 2 * 3 = 6. Then 7-6=1. Therefore 1 is the answer.