Make a program that will ask for input numbers from users and check if the number is multiple of 3 and also multiple of 7.

Answer 1

Let's see your attempt first, but I will give you a hint. If it MUST be a multiple of BOTH 3 and 7, then it must be a multiple of 21(7*3) so you only need one if statement there:

num%21==0

Answer 2

Where is your attempts ??