how the modulous operator work i.e '%' ?

Answer 1

x=a%b is
x=a-(largest number that is divsible by b but less than or equal to a)

example
100%3
=100-99
=1

13%7
=13-7
=6

15%5
=0

15%0
=0

also keep in mind that we are talking about positive integers.

Answer 2

the % divides a number and gives you the remainder. Example: x = 15 % 6; first it will do 15/6 which is 2 and the remainder is 3. 3 gets assigned to x there for x is 3.

Answer 3

'%' operator gives u da remainder wen u divide any two nos. a and b as a/b