The output is 6 but Idk hw plzz help!!

Question

int n=15, s=0, x;
for(int i=0; i<=n ; i++ ){
x = n%10 ;
s=s + x;
n = n/10;
}
System.out.print(s);

Answer 1

This is an algorithm to calculate the sum of all digits in an integer, e.g.

n = 1234

// outputs 1+2+3+4

In this case, n = 15. You may try tracking the variable values in the loops. E.g.

// first loop

x = n%10 ; // x stores 5
s = s + x; // s stores 5
n = n/10; // n becomes 1

// second loop

x = n%10 ; // x stores 1
s = s + x; // s stores 6
n = n/10; // n becomes 0

System.out.print(s); // prints 6

Answer 2

Additional to the explanations of Rei and Szabo:
https://code.sololearn.com/cKvNWLB4wqnz/?ref=app

Answer 3

1.iteration:
i = 0
x = 15%10 = 5
s = 0+5 = 5
n = 15/10 = 1 because is int.

2.iteration
i = 1
x = 1%10 = 1
s = 5 + 1 = 6
n = 1 /10 = 0

i <= n (2 < 0) false, so no more iteration.

s = 6