do-while and while comparison

Question

do-while:

do
{ 
    i++; 
    ++j;
    System.out.println( i * j );

}
while ((i < 10) && (j*j != 25));

I am learning about do-w

Answer 1

No, the two codes are not equivalent. do-while only checks the condition at the end of the loop so i++, ++j and System.out.println(i * j) happen at least once regardless of the initial values of i and j. while skips the entire loop if the condition isn't true for the first time the loop is entered.

You can achieve the same effect with while by copying the loop's body once before the loop, for instance.