Question

How many times is "invalid" displayed in the following loop?

for (int k=o; k<3; K++)

{ for(int j =0; j < 4; j++)

{ cout << "invalid"; }

}

Answer 1

Question:
How many times is "invalid" displayed in the following loop?
for (int k=0; k<3; k++)
{
for(int j =0; j < 4; j++)
{
cout << "invalid ";
}
}
Ans: 12 times. The word "invalid" is printed 12 times using both the for loops.

• As we can see, In the 1st for loop i.e., outer for loop the loop variable k iterates from 0 to 3
• And the inner for loop with the loop variable j iterates from 0 to 4.
• So, we can say that for every one iteration of the outer loop, the inner loop iterates for 4 times
• So, if we can calculate 1 outer loop iterates means 4 times the inner loop will execute and print "invalid"
• Since the outer loop is iterating from 0 to 3(exclusive). The outer loop will execute for 3 times(for k=0, 1, and 2)
• Thus we can say that the inner loop executes 12 times which is 3(outer loop) * 4(inner loop) --> 12.
• Thus for 12 times the word "invalid" is displayed in the following loop

Please check the compiled program and its output for your reference:

Output:

(Feel free to drop me a comment, If you need any help)

Hope this Helps!!!
Please upvote as well, If you got the answer?
If not please comment, I will Help you with that...