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# ctanhf, ctanh, ctanhl

From cppreference.com
< c‎ | numeric‎ | complex

Defined in header `<complex.h>` |  |
float complex ctanhf( float complex z ); |  | (since C99)
double complex ctanh( double complex z ); |  | (since C99)
long double complex ctanhl( long double complex z ); |  | (since C99)

Computes the complex hyperbolic tangent of `z`.

### [edit] Parameters

z | - | complex argument

### [edit] Return value

The complex hyperbolic tangent of `z`.

### [edit] Example

Run this code

    #include <stdio.h>
    #include <complex.h>
    #include <math.h>

    #define PI acos(-1)

    int main(void)
    {
        double complex z;

        /* Hyperbolic functions are periodic with respect to the imaginary component. */
        /* The period of tanh is pi*i.                                                */
        z = ctanh(0.0+0.0*PI*I);
        printf("ctanh(0.0+0*PI*I) ==> %f%+fi\n", creal(z),cimag(z));

        z = ctanh(0.0 + 1*PI*I);
        printf("ctanh(0.0+1*PI*I) ==> %f%+fi\n", creal(z),cimag(z));

        z = ctanh(0.0 + 2*PI*I);
        printf("ctanh(0.0+2*PI*I) ==> %f%+fi\n", creal(z),cimag(z));

        return 0;
    }

Output:

    ctanh(0.0+0*PI*I) ==> 0.000000+0.000000i
    ctanh(0.0+1*PI*I) ==> 0.000000-0.000000i
    ctanh(0.0+2*PI*I) ==> 0.000000-0.000000i

### [edit] See also

csinh csinhf csinhl (C99)(C99)(C99) | computes the complex hyperbolic sine (function) [edit]
ccosh ccoshf ccoshl (C99)(C99)(C99) | computes the complex hyperbolic cosine (function) [edit]
catanh catanhf catanhl (C99)(C99)(C99) | computes the complex arc hyperbolic tangent (function) [edit]
tanh tanhf tanhl (C99)(C99) | computes hyperbolic tangent (function) [edit]
C++ documentation for tanh

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