doubles: how do they differ to int?

Answer 1

doubles are numbers with decimals, e.g. 7.15, 47.88
int are whole numbers, e.g.: 5, 42, 88

Answer 2

Int is whole numbers. They also differ in byte size. Doubles take up more space than int, and is therefore heavier to run for the program.

Answer 3

Doubles are used to store large decimal numbers and it's size is 4 or 8 bytes. Int is used to store whole numbers. its size is 2 or 4 bytes