It rounds a float

Example

<?php
echo round(17.7);
?>

Output

18

It generates a random integer

Example

<?php
echo rand();
?>

Output

648369316

It converts the radian number to the equivalent number in degrees

Example

<?php
echo rad2deg(M_PI_4);
?>

Output

45

It returns Exponential expression

Example

<?php
echo pow(-1, 17);
?>

Output

-1

It returns the value of pi

<?php
echo pi();
?>

Output

3.1415926535898

It converts octal number to decimal

Example

<?php
echo octdec(11);
?>

Output

9

It  seed the better random number generator

Example

<?php
mt_srand(mktime());
echo(mt_rand());
?>

Output

254590754

It generates a better random value

Example

<?php
echo mt_rand(111,2222);
?>

Output

1787

It returns  largest possible random value

Example

<?php
echo mt_getrandmax();
?>

Output

2147483647

It returns lowest value

Example

<?php
echo min(10,11,17)
?>

Output

10