how to restore number after modulo

Question

How can I cache the original digits I removed in a modulo action, so they can subsequently be restored after substituting a digit with another digit?

Example:

Public void setDigit(int number, int place, int newdigit) {
    Int num = number;
    Int k = place;
    Int newDigit = newdigit;

    For(int x = 0; x<k; x++) {
        Num/=10;
    }

    Num%=10;
    Num = newDigit 
} 

Please help thanks in advance.

Answer 1

If I understood your question correctly, if num = 1234for example you want to find 123 when you take the modulo of 10.

To do this you can simply use num / x where num is an int and x is an int which euqls the modulo you just used.

So in this case num %= 10 gives num = 4. But if we did num / 10 first then we would get 123.