clog - Online Linux Manual PageSection : 3
Updated : 2022-12-15
Source : Linux man-pages 6.03

---

NAMEclog, clogf, clogl − natural logarithm of a complex number

---

LIBRARYMath library (libm, −lm)

---

SYNOPSIS#include <complex.h>double complex clog(double complex z); float complex clogf(float complex z); long double complex clogl(long double complex z);

---

DESCRIPTIONThese functions calculate the complex natural logarithm of z, with a branch cut along the negative real axis. The logarithm clog() is the inverse function of the exponential cexp(3). Thus, if y = clog(z), then z = cexp(y). The imaginary part of y is chosen in the interval [−pi,pi]. One has: clog(z) = log(cabs(z)) + I * carg(z)Note that z close to zero will cause an overflow.

---

VERSIONSThese functions were added in glibc 2.1.

---

ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue clog(), clogf(), clogl() Thread safetyMT-Safe

---

STANDARDSC99, POSIX.1-2001, POSIX.1-2008.

---

SEE ALSOcabs(3), cexp(3), clog10(3), clog2(3), complex(7) 0

---

Johanes Gumabo

---

Data Size   :   7,059 byte
man-clog.3Build   :   2024-12-05, 20:55   :  
Visitor Screen   :   x
Visitor Counter ( page / site )   :   3 / 189,123
Visitor ID   :     :  
Visitor IP   :   3.148.144.139   :  
Visitor Provider   :   AMAZON-02   :  
Provider Position ( lat x lon )   :   39.962500 x -83.006100   :   x
Provider Accuracy Radius ( km )   :   1000   :  
Provider City   :   Columbus   :  
Provider Province   :   Ohio ,   :   ,
Provider Country   :   United States   :  
Provider Continent   :   North America   :  
Visitor Recorder   :   Version   :  
Visitor Recorder   :   Library   :  
Online Linux Manual Page   :   Version   :   Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.05
Online Linux Manual Page   :   Library   :   lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Online Linux Manual Page   :   Library   :   lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Data Base   :   Version   :   Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38
Data Base   :   Library   :   lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36

---

Very long time ago, I have the best tutor, Wenzel Svojanovsky . If someone knows the email address of Wenzel Svojanovsky , please send an email to johanes_gumabo@yahoo.co.id .

---

If error, please print screen and send to johanes_gumabo@yahoo.co.id
Under development. Support me via PayPal.

---