Question

What math can you use in this following example:

I want to divide a number by 2, but the result should always be a whole number.That means I cannot divide by 2 when the number is odd.

For ex.

when I divide 5 by 2.I want the output as 3 or 2, but not 2.5

Answer 1

Use the math functions ceil or floor:

$number = 5 / 2;
echo ceil( $number); // Outputs 3
echo floor( $number); // Outputs 2

$number = 4 / 2;
echo ceil( $number); // Outputs 2
echo floor( $number); // Outputs 2

Demo