std::abs(float), std::fabs

From Cppreference

C++ Standard Library
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Common mathematical functions
Functions Basic operations abs(int) labs llabs imaxabs (C++11) abs(float) fabs div ldiv lldiv imaxdiv (C++11) fmod remainder (C++11) remquo (C++11) fma (C++11) fmax (C++11) fmin (C++11) fdim (C++11) nan nanf nanl (C++11) (C++11) (C++11) Exponential functions exp exp2 (C++11) expm1 (C++11) log log10 log1p (C++11) Power functions sqrt cbrt (C++11) hypot (C++11) pow Trigonometric and hyperbolic functions sin cos tan asin acos atan atan2 sinh cosh tanh asinh (C++11) acosh (C++11) atanh (C++11) Error and gamma functions erf (C++11) erfc (C++11) lgamma (C++11) tgamma (C++11) Nearest integer floating point operations ceil floor round lround llround (C++11) (C++11) (C++11) trunc (C++11) nearbyint (C++11) rint lrint llrint (C++11) (C++11) (C++11) Floating point manipulation functions ldexp scalbn scalbln (C++11) (C++11) ilogb (C++11) logb (C++11) frexp modf nextafter nexttoward (C++11) (C++11) copysign (C++11) Classification fpclassify (C++11) isfinite (C++11) isinf (C++11) isnan (C++11) isnormal (C++11) signbit (C++11) Macro constants HUGE_VALF HUGE_VAL HUGE_VALL (C++11) (C++11) FP_NORMAL FP_SUBNORMAL FP_ZERO FP_INFINITE FP_NAN (C++11) (C++11) (C++11) (C++11) (C++11)

Defined in header <cmath>
float       abs( float arg );
double      abs( double arg );
long double abs( long double arg );
float       fabs( float arg );
double      fabs( double arg );
long double fabs( long double arg );

Computes the absolute value of a floating point value arg.

[edit] Parameters

arg

-

floating point value

[edit] Return value

the absolute value of arg (|arg|)

[edit] See also

abs(int) labs llabs imaxabs (C++11)	computes absolute value of an integral value (|x|) (function)
signbit (C++11)	checks if the given number is negative (function)
abs(std::complex)	returns the magnitude of a complex number (function template)
abs(std::valarray)	applies the function std::abs to each element of valarray (function template)