Question

What's the difference between float and double?

Answer 1

double is has more precision than a floating number.

float is 4 bytes(32 bits)
double is 8 bytes (64 bits)

Answer 2

i got it, thanks for the answer! +)

Answer 3

Don't count on those bit sizes. The C standard is cagey about the sizes of it's data types. It probably only guarantees that doubles are larger than floats.