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cabsf, cabs, cabsl

Defined in header <complex.h> 
float       cabsf( float complex z );
-		 (1) (since C99) 
double      cabs( double complex z );
-		 (2) (since C99) 
long double cabsl( long double complex z );
-		 (3) (since C99)
Defined in header <tgmath.h> 
#define fabs( z )
-		 (4) (since C99)
-1-3) Computes the complex absolute value (also known as norm, modulus, or magnitude) of z.
-4) Type-generic macro: if z has type long double complex or long double imaginary, cabsl is called. If z has type float complex or float imaginary, cabsf is called. If z has type double complex or double imaginary, cabs is called. For real and integer types, the corresponding version of fabs is called.

Parameters

- -
z - complex argument

Return value

If no errors occur, returns the absolute value (norm, magnitude) of z.

-

Errors and special cases are handled as if the function is implemented as hypot(creal(z), cimag(z))

-

Example

#include <stdio.h>
-#include <complex.h>
- 
-int main(void)
-{
-    double complex z = 1.0 + 1.0*I;
-    printf("%.1f%+.1fi cartesian is rho=%f theta=%f polar\n",
-           creal(z), cimag(z), cabs(z), carg(z));
-}

Output:

-
1.0+1.0i cartesian is rho=1.414214 theta=0.785398 polar

References

See also

- - - - -
-
(C99)(C99)(C99)
 computes the phase angle of a complex number
(function)
-
(C99)
 computes absolute value of an integral value (\(\small{|x|}\)|x|)
(function)
-
(C99)(C99)
 computes absolute value of a floating-point value (\(\small{|x|}\)|x|)
(function)
-
(C99)(C99)(C99)
 computes square root of the sum of the squares of two given numbers (\(\scriptsize{\sqrt{x^2+y^2} }\)√x2+y2)
(function)
C++ documentation for abs
-

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/numeric/complex/cabs -

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