July 2002
Beginner to intermediate
96 pages
1h 53m
English
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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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