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Can someone explain this code to me....
class ReverseNumberDemo
{ public static void main(String args[]) {
int num=123456789;
int reversenum =0;
while( num != 0 ) {
reversenum = reversenum * 10;
reversenum = reversenum + num%10;
num = num/10; }
System.out.println("Reverse of specified number is: "+reversenum);
}
}
the thing I don't get is the reversenum part......isn't reversenum=0 so wouldn't reversenum*10=0
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Function modulo is easy.
For example 14 modulo 3. We must find number, which is smaller than 14 (<14), can be divided ( /) and it will be rational number (1, 2, 3... Not numbers like 3,123). It's 12 (12/3=4). Then we just subtract 14 and 12 (14-12). It's 2.
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