How Can You Use Ln Function in C Programing?

Sarah Jenkins
Sarah Jenkins
• • 1 min read

Header File Math. H Is for Mathematical Functions Like Cos, Sin, Tan. . but How to Write the Ln Function and Not Log? 7 3 Answers the C Function Log Is the...

How Can You Use Ln Function in C Programing?

Header file math.h is for mathematical functions like cos,sin, tan.. But how to write the ln function and not log?

7

3 Answers

The C function log is the natural logarithm, which mathematicians usually write as "ln".

The C function log10 is the logarithm base 10, which is sometimes written "log".

Remember math at school: logA_B = logA_C/logB_C

double ln(double x) { return log(x); }

Or in a pinch

#define ln(x) log(x)

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Sarah Jenkins

Sarah Jenkins

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Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.

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