Programming in C++, 2nd Edition

Nested for Loops 191

Explanation: One must be aware that only those years that are

(a) divisible by 4 and not 100,

(b) divisible by 100 and also 400

alone are qualified to be called as leap years. The above program checks for these conditions for

all years from 2000 to 2012 and then prints the year if it is leap. Stress is on ‘for’ loop con-

struct and use of ‘if’ and ‘else – if’ in the body.

6.4 NESTED for LOOPS

We can also nest for loop to gain more advantage in some situations. The nesting level is not

restricted at all. In body of a ‘for’ loop any number of sub -‘for’ loop(s) may exist.

6.5 Write a program to demonstrate nested for loops.

#include<iostream.h> ...