log1p : log1p « math.h « C Tutorial

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C Tutorial » math.h » log1p 
19.44.1.log1p
ItemValue
Header filemath.h
Declarationfloat log1pf(float num);
double log1p(double num);
long double log1pl(long double num);
Returnreturns the natural logarithm for num+1.


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

  int main(void)
  {
    double val = 1.0;

    do {
      printf("%f %f\n", val, log1p (val));
      val++;
    while (val<11.0);

    return 0;
  }
1.000000 0.693147
2.000000 1.098612
3.000000 1.386294
4.000000 1.609438
5.000000 1.791759
6.000000 1.945910
7.000000 2.079442
8.000000 2.197225
9.000000 2.302585
10.000000 2.397895
19.44.log1p
19.44.1.log1p
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