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

Modulus should only be used with integer. The remainder come from an euclidean division. With double, you can have unexpected results.

See this article