Defined in header <complex> | ||
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template< class T > T abs( const complex<T>& z ); |
Returns the magnitude of the complex number z.
| z | - | complex value |
If no errors occur, returns the absolute value (also known as norm, modulus, or magnitude) of z.
Errors and special cases are handled as if the function is implemented as std::hypot(std::real(z), std::imag(z)).
#include <complex>
#include <iostream>
int main()
{
std::complex<double> z(1, 1);
std::cout << z << " cartesian is rho = " << std::abs(z)
<< " theta = " << std::arg(z) << " polar\n";
}Output:
(1,1) cartesian is rho = 1.41421 theta = 0.785398 polar
| returns the phase angle (function template) |
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| constructs a complex number from magnitude and phase angle (function template) |
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(C++11) | computes absolute value of an integral value (\(\small{|x|}\)|x|) (function) |
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(C++11)(C++11) | absolute value of a floating point value (\(\small{|x|}\)|x|) (function) |
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(C++11)(C++11)(C++11) | computes square root of the sum of the squares of two or three (since C++17) given numbers (\(\scriptsize{\sqrt{x^2+y^2} }\)√x2 +y2 ), (\(\scriptsize{\sqrt{x^2+y^2+z^2} }\)√x2 +y2 +z2 ) (since C++17) (function) |
applies the function abs to each element of valarray (function template) |
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C documentation for cabs |
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