Given a number N, check if it is divisible by 7 or not.

Given a number {data}, check if it is divisible by 7 or not without using modulo operator and floating point arithmetic.

Hint

"A number of the form 10a + b is divisible by 7 if and only if a – 2b is divisible by 7." If you don't know this rule, keep subtracting 7 from your number until you reach a number less than 7. If the final number is 0, then the original number is divisible by 7.

Python
Javascript

# Python implementation

n = 36
n = abs(n)

while(n >= 7):
  n -= 7

print(n == 0)

// Javascript implementation

let n = 36;
n = Math.abs(n);

while(n >= 7) {
  n -= 7;
}

console.log(n == 0);