Digit Frequency in Java: Explanation & Practice

Problem summary

Count how many times a specific digit appears in a number.

Starter code

public class Main {
    public static void main(String[] args) {
        int number = 122333;
        int digit = 3; // Test case 1
        
        // Count occurrences of digit in number
        // Print: Count: <result>
    }
}

Expected output and test cases

• 3 appears 3 times in 122333

  Count: 3

• 2 appears 2 times in 122333

  Count: 2

• 5 appears 0 times in 122333

  Count: 0

Hints

1. Extract each digit using modulus
2. Compare with target digit
3. Count matches while reducing number

Related Control Flow exercises

• Practice Number Pattern in Java
• Practice Star Pyramid in Java
• Practice Decimal to Binary in Java

Practice all Control Flow exercises · Run this idea in the Java compiler