9% 4 is 1 cout yield to display modulu1 : the following statement a string and a value, to cout : 17 % 3 is 2 (the remainder when 17 is divided by 3 is 2)
14 % 2 is 0 (the remainder when 14 is divided by 2 is 0) Integer Division The division of two integer values can produce rather strange results for the unwary. For example, the expression 15/2 yields the integer result 7.
Because integers can’t contain a fractional part, the value 7.5 can’t be obtained. The fractional part resulting when two integers are divided—the remainder—is always dropped (truncated). Therefore 9/4 is 2. And 20/3 is 6.
You need to retain the remainder of an integer division . C++ provides the modulus operator (also referred to as the “remainder operator”), This operator captures the remainder when an integer is divided by an integer; using a non-integer value with the modulus operator results in a compiler error.