std::expm1
From cppreference.com
| Defined in header <cmath>
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| float expm1( float arg );
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(since C++11) | |
| double expm1( double arg );
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(since C++11) | |
| long double expm1( long double arg );
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(since C++11) | |
| double expm1( Integral arg );
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(since C++11) | |
Computes the e (Euler's number, 2.7182818) raised to the given power arg, minus 1. This function is more accurate than the expression std::exp(arg)-1 if arg is close to zero.
[edit] Parameters
| arg | - | floating point value |
[edit] Return value
earg
-1
If the result is too large for the underlying type, range error occurs and HUGE_VAL is returned.
[edit] See also
| returns e raised to the given power (ex) (function) |
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| (C++11)
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natural logarithm (to base e) of 1 plus the given number (function) |
| (C++11)
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returns 2 raised to the given power (2x) (function) |