How many times will the following loop display "Looping again!"? for(int i=0; i<=20; i++) cout << "Looping again!" << endl;

21 times

Explanation:

Following are the description of output:

As it is for loop and The loop is started from the i=0 , after that check the condition 0<=20 condition is true .The control moves to the body of loop and it print Looping again! on the console window .After that it increment the value of i=i+1 .Now i=1  1<=20  condition is true .The control moves to the body of loop and it print Looping again! on the console window .After that it increment the value of i=i+1 .i=2 2<=20 condition is true .The control moves to the body of loop and it print Looping again! on the console window .After that it increment the value of i=i+1 soonThis process is executed again and again but when the value i=21 the loop condition is false .The loop is terminated .As the loop is starts from the i=0 and executed less then equal to 20 therefore 21 times the loop is executed .