abs() function
ceil() function
floor() function
sqrt() function
rand() function
abs() function
<?php
echo abs(5); // 0utputs: 5 (integer)
echo abs(-5); // 0utputs: 5 (integer)
echo abs(4.2); // 0utputs: 4.2 (double/float)
echo abs(-4.2); // 0utputs: 4.2 (double/float)
?>
As you can see if the given number is negative, the valued returned is positive. But, if the number is positive, this function simply returns the number.
ceil() function and floor() function
can be used to round a fractional value up to the next highest integer value
<?php
// Round fractions up
echo ceil(4.2); // 0utputs: 5
echo ceil(9.99); // 0utputs: 10
echo ceil(-5.18); // 0utputs: -5
// Round fractions down
echo floor(4.2); // 0utputs: 4
echo floor(9.99); // 0utputs: 9
echo floor(-5.18); // 0utputs: -6
?>
sqrt() function
<?php
echo sqrt(9); // 0utputs: 3
echo sqrt(25); // 0utputs: 5
echo sqrt(10); // 0utputs: 3.1622776601684
echo sqrt(-16); // 0utputs: NAN
?>
Generate a Random Number
rand() function
<?php
// Generate some random numbers
echo rand() . "<br>";
echo rand() . "<br>";
// Generate some random numbers between 1 and 10 (inclusive)
echo rand(1, 10) . "<br>";
echo rand(1, 10) . "<br>";
?>
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