# K-th digit in ‘a’ raised to power ‘b’ in C++

C++Server Side ProgrammingProgramming

In this tutorial, we are going to write a program that finds the k-th digit from the right side in the number ab

It's a straightforward problem. Let's see the steps to solve it.

• Initialise the numbers a, b, and k.
• Find the value of abusing pow method.
• Write a loop that iterates until power value is less than zero or count is less than k.
• Get the last digit from the power value.
• Increment the counter.
• Check whether k and counter are equal or not.
• Return the digit if they are equal
• Return -1.

## Example

Let's see the code.

Live Demo

#include <bits/stdc++.h>
using namespace std;
int getTheDigit(int a, int b, int k) {
int power = pow(a, b);
int count = 0;
while (power > 0 && count < k) {
int rem = power % 10;
count++;
if (count == k) {
return rem;
}
power /= 10;
}
return -1;
}
int main() {
int a = 5, b = 6;
int k = 3;
cout << getTheDigit(a, b, k) << endl;
return 0;
}

### Output

If you run the above code, then you will get the following result.

6

## Conclusion

If you have any queries in the tutorial, mention them in the comment section.

Published on 09-Apr-2021 12:18:21