Problem Name : Primary Arithmetic
Solution :
Assume that a=99 and b=9999 so how to count carry variable ?
let's see,
n1=a%10 got 9
n2=b%10 got 9
sum=9+9=18 so carry=1
n1=a%10 got 9
n2=b%10 got 9
sum=9+9=18 so carry= 1+1 (previous counted 1) and so on...
Another way if , sum is not equal or greater than 10 than carry=0.
