How to express log2 function in C language
There is no built-in log2 function in C language. It can be calculated using the following formula: log2(x) = log(x) / log(2). Usage steps: include the <math.h> header file, use log2(x) expression, and store or use for further calculations.
Expression of log2 function in C language
There is no built-in log2 function in C language. However, you can use the following equivalent expression to calculate log2:
#include <math.h> double log2(double x) { return log(x) / log(2); }
How to use the log2 function
To use the log2 function, follow these steps:
- Contains the
<math.h>
header file. - Use the
log2(x)
expression, wherex
is the number whose logarithm of 2 you want to calculate. - Store the result or use it for further calculations.
Example
The following code snippet demonstrates how to use the log2 function:
#include <math.h> double x = 8; double log2_x = log2(x); printf("log2(%f) = %f\n", x, log2_x);
Output:
<code>log2(8.000000) = 3.000000</code>
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