Question

How to remove specific digit from a number in Java

Answer 1

public class MyClass {
    public static int reverse_number(int num) {
        int reminder = 0, reverse = 0;
        while (num != 0) {    
            reminder = num % 10;      
            reverse = reverse * 10 + reminder;    
            num /= 10;    
        }
        return reverse;
    } 
    
    public static int delete_digit(int num, int d) { 
        int rev_new_num = 0; 
           
        while (num != 0) { 
            int digit = num % 10; 
            num = num / 10; 
         
            if (digit != d) { 
                rev_new_num = (rev_new_num * 10) + digit; 
            } 
        } 
       
        return reverse_number(rev_new_num); 
    } 
     
    public static void main(String args[]) {
        int num = 37598; 
     
        System.out.println(delete_digit(num, 3));
        System.out.println(delete_digit(num, 8));
        System.out.println(delete_digit(num, 5));
    }
}
 
 
 
/*
run:
 
7598
3759
3798
 
*/

 

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