number1 = 0;
number2 = 0;
while(number1 < 5)
number1 ++;
number2 += number1;
problem#1 : what is the value of number1 when the loop exits?
problem#2 : what is the value of number2 when the loop exits?
problem#3 : if the statement number1++ is changed to ++number1, what is the value of number1 when the loop exits?
problem#4 : what could you do to force the value of number2 to be 15 when the loop exits?