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Bewar MaronsiCourses Plus Student 1,055 Points
Hello, I'm trying to find out how modulus works, I haven't been able to find a simple answer to my question. How does it operate, what does it do to extract 10 out 70 % 30 as an example? Would be really glad if someone could help me out with this one with basic English. Thank you.
Jennifer NordellTreehouse Teacher
Hi there! My guess is you probably remember learning division a long time ago. When you first began, the teachers likely taught you to write your answers as 2 1/2 instead of 2.5, right? The modulus of 5 % 2 would be 1. Five divided by two results in a remainder of 1. It's the remainder we're after here.
So in your example, 70 % 30, 10 is the remainder of 70 divided by 30. 70 divided by 30 results in 2 with a remainder of 10. Two times 30 is 60. 70 minus 60 is 10.
Among other things, this is commonly used to check if a number is even or odd. Any number that is evenly divisible by two is said to be even. Thus, you can check for
num % 2 == 0. If that is true, then the number is even. Otherwise, it's odd.
Hope this helps!