Returns the absolute value of its operand.
Returns the arctangent of y/x in the range to .
Returns the cosine of expr (expressed in radians).
Returns e to the power of expr.
Returns the integer portion of expr.
Returns the natural logarithm (base e) of expr.
Returns a random fractional number between 0 (inclusive) and the value of expr (exclusive). If expr is omitted, it defaults to 1.
Returns the sine of expr (expressed in radians).
Returns the square root of expr.
Sets the random number seed for the rand operator.
Returns the number of nonleap seconds since whatever time the system considers to be the epoch. Suitable for feeding to gmtime and localtime.