| Statement | Function |
atan2($x,$y) | Returns the arctangent of $y/$x. |
cos($x) | Returns the cosine of $x. |
exp($x) | Returns e$x, where e = 2.7182818 |
int($x) | Returns the largest integer less than $x. |
log($x) | Returns the natural logarithm of $x. |
rand | Returns a random number. |
sin($x) | Returns the sine of $x. |
sqrt($x) | Returns the square root of $x. |
srand | Initializes the random number generator. |
| time | Returns the current time. |