will there be a difference if i use float instead of double?

Answer 1

float is 32 bit while double is 64 bit

Answer 2

Double needs a memory twice that a float does, but Double is more formal used.

Answer 3

The biggest difference you will notice is that double is more accurate

if you have a number such as 11.11 float would return 11.10, as it goes to the closest increment of 5