Why is modulus operator not working for double in c#?

Question

Consider this:

double x,y;
x =120.0;
y = 0.05;

double z= x % y;

I tried this and expected the result to be 0, but it came out 0.04933333.<

Answer 1

You could do something like:

double a, b, r;

a = 120;
b = .05;

r = a - Math.floor(a / b) * b;

This should help ;)