std::abs(float), std::fabs
From cppreference.com
Defined in header
<cmath>
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float abs( float arg );
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(1) | |
double abs( double arg );
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(2) | |
long double abs( long double arg );
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(3) | |
float fabs( float arg );
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(4) | |
double fabs( double arg );
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(5) | |
long double fabs( long double arg );
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(6) | |
double fabs( Integral arg );
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(7) | (since C++11) |
1-6) Computes the absolute value of a floating point value
arg
.
7) A set of overloads or a function template for all combinations of arguments of arithmetic type not covered by 4-6). If any argument has integral type, it is cast to double. If any other argument is long double, then the return type is long double, otherwise it is double.
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[edit] Parameters
arg | - | Value of a floating-point or Integral type |
[edit] Return value
If successful, returns the absolute value of arg
(|arg|
). The value returned is exact and does not depend on any rounding modes.
[edit] Error handling
This function is not subject to any of the error conditions specified in math_errhandling
If the implementation supports IEEE floating-point arithmetic (IEC 60559),
- If the argument is ±0, +0 is returned
- If the argument is ±∞, +∞ is returned
- If the argument is NaN, NaN is returned
[edit] Example
Run this code
Possible output:
abs(+3.0) = 3 abs(-3.0) = 3 abs(-0.0) = 0 abs(-Inf) = inf
[edit] See also
(C++11)
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computes absolute value of an integral value (|x|) (function) |
(C++11)
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copies the sign of a floating point value (function) |
(C++11)
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checks if the given number is negative (function) |
returns the magnitude of a complex number (function template) |
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applies the function std::abs to each element of valarray (function template) |
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C documentation for fabs
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