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Check if a large number is divisible by 8 or not in C++
Here we will see how to check a number is divisible by 8 or not. In this case the number is very large number. So we put the number as string.
A number will be divisible by 8, if the number formed by last three digits are divisible by 8.
Example
#include <bits/stdc++.h>
using namespace std;
bool isDiv8(string num){
int n = num.length();
int last_three_digit_val = (num[n-3] - '0') * 100 + (num[n-2] - '0') * 10 + ((num[n-1] - '0'));
if(last_three_digit_val % 8 == 0)
return true;
return false;
}
int main() {
string num = "1754586672360";
if(isDiv8(num)){
cout << "Divisible";
}else{
cout << "Not Divisible";
}
}Output
Divisible
Updated on: 27-Sep-2019
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