C/math.h/log1p
log1p: returns the natural logarithm for num+1
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//Declaration: float log1pf(float num);
double log1p(double num); long double log1pl(long double num); #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
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