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Find the frequency of a digit in a number using C++.
Here we will see how to get the frequency of a digit in a number. Suppose a number is like 12452321, the digit D = 2, then the frequency is 3.
To solve this problem, we take the last digit from the number, then check whether this is equal to d or not, if so then increase the counter, then reduce the number by dividing the number by 10. This process will be continued until the number is exhausted.
Example
#include<iostream>
using namespace std;
int countDigitInNum(long long number, int d) {
int count = 0;
while(number){
if((number % 10) == d)
count++;
number /= 10;
}
return count;
}
int main () {
long long num = 12452321;
int d = 2;
cout << "Frequency of " << 2 << " in " << num << " is: " << countDigitInNum(num, d);
}Output
Frequency of 2 in 12452321 is: 3
Updated on: 30-Oct-2019
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