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Check if a number is multiple of 5 without using / and % operators in C++
Here we will see how to check a number is divisible by 5 or not. One simple approach is that if the number mod 5 = 0, then, the number is divisible by 5. But here we will not use / or % operator. To check whether a number is divisible by 5, we have to see the last number is 0 or 5. If that is 0 or 5, the number is divisible by 5, otherwise not. Here we can use some large numbers also as a string to check.
Example
#include <bits/stdc++.h>
using namespace std;
bool isDiv5(string num){
int n = num.length();
if(num[n - 1] != '5' && num[n - 1] != '0')
return false;
return true;
}
int main() {
string num = "154484585745184258458158245285265";
if(isDiv5(num)){
cout << "Divisible";
} else {
cout << "Not Divisible";
}
}Output
Divisible
Updated on: 22-Oct-2019
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