What Is The Output Of The Following Code Segment? N = 1; While (N <= 5) Cout << N << ' '; N++;?

What Is the Output of The Following Code Segment? N = 1; While (N <= 5) Cout << N << ‘ ‘; N++;

1. 3 4 5 7
2. 2 7 9 4
3. 1 9 0 3
4. 5 6 9 4
5. 1 1 …. ans so on. 

Answer: The correct answer to the following code when it is executed is option 5.

The purpose to use loops is to repeat the code. Such as if you want to display the message 10 times then instead to write it over and over you can take help from the loops. Loops are efficient and also enhance the program efficient. Three types of loops exist which are listed below:

• While loop.
• do-while loop.
• for loop.

While loop:

While loop work by determining the given condition, and it is true the while loop body code is executed. The condition was checked again till it was false, after that the loop terminated.

The while loop syntax is:

While (condition) {

 Loop body

}

do While:

It is the extension of the while loop and the major difference is that in it the loop is executed and then the condition checked, which is the opposite of the while loop. The syntax of the do-while loop is :

Do {

Loop body

}

While (condition);

So  do while work in the following way:

• loop body executed and then condition verified.
• When the condition is true the body of the do statement is executed again.
• Condition checked again
• The evaluation continues till the given condition is false and then the loop terminated.

For loop:

For loop is considered as the repetitive loop which permits you to write it when you need to execute it for a specific time. The syntax of the for loop is:

For (i=; i<= condition; i++) {

Body of loop

}

It works in the following order:

• At first the initiation of the loop work.
• The condition checks if it is true then the statements of the loop are executed.
• After that, the increment in the loop happens and the loop continues.
• The loop is terminated when the condition is false.