17. Arithmetic Functions

Chapter 17. Arithmetic Functions

abs expr†: Returns the absolute value of its operand.
atan2 y, x: Returns the arctangent of y/x in the range to .
cos expr†: Returns the cosine of expr (expressed in radians).
exp expr†: Returns e to the power of expr.
int expr†: Returns the integer portion of expr.
log expr†: Returns the natural logarithm (base e) of expr.
not expr: Logically negates the truth value of expr.
rand [ expr ]: Returns a random fractional number between 0 (inclusive) and the value of expr (exclusive). If expr is omitted, it defaults to 1.
sin expr†: Returns the sine of expr (expressed in radians).
sqrt expr†: Returns the square root of expr.
srand [ expr ]: Sets the random number seed for the rand operator.
time: Returns the number of non-leap seconds since whatever time the system considers to be the epoch. Suitable for feeding to gmtime and localtime.

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