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expm1

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< c‎ | numeric‎ | math
Revision as of 16:28, 1 July 2013 by P12bot (Talk | contribs)

 
 
 
Common mathematical functions
Functions
Basic operations
(C99)
(C99)
(C99)
(C99)
(C99)
(C99)(C99)(C99)
Exponential functions
(C99)
expm1
(C99)
(C99)
(C99)
Power functions
(C99)
(C99)
Trigonometric and hyperbolic functions
(C99)
(C99)
(C99)
Error and gamma functions
(C99)
(C99)
(C99)
(C99)
Nearest integer floating point operations
(C99)(C99)(C99)
(C99)
(C99)(C99)(C99)
Floating point manipulation functions
(C99)(C99)
(C99)
(C99)
Classification
(C99)
(C99)
(C99)
Macro constants
 
Defined in header <math.h>
float       expm1f( float arg );
(since C99)
double      expm1( double arg );
(since C99)
long double expm1l( long double arg );
(since C99)

Computes the e (Euler's number, 2.7182818) raised to the given power arg, minus 1. This function is more accurate than the expression exp(arg)-1 if arg is close to zero.

Parameters

arg - floating point value

Return value

earg
-1

If the result is too large for the underlying type, range error occurs and HUGE_VAL is returned.

See also

returns e raised to the given power (ex)
(function) [edit]
(C99)
returns 2 raised to the given power (2x)
(function) [edit]