sri ramanuja seva

(You can see Part 2 of the tutorial here: while loop tutorial – Part 2)

Some more simple programs using while loop in C. Pls refer to the pictures above.

Q.1. Write a program to display Jai Sriman Narayana 5 times.

Answer.
// Program to display Jai Sriman Narayana 5 times

#include <stdio.h>
int main()
{
int i = 1; //initialisation of the loop counter

while (i <= 5)   //condition 
{
    printf("Jai Sriman Narayana\n");  //display Jai Sriman Narayana
    i++;   //increment the loop counter 
}
printf("Thank you!\n");  
return 0;

}

output:
Jai Sriman Narayana
Jai Sriman Narayana
Jai Sriman Narayana
Jai Sriman Narayana
Jai Sriman Narayana
Thank you!

Q.2. What will the following code fragment output?

int k = 1;
while (k < 5)
{
    printf("Jai Sriman Narayana\n");
    k++;
}
printf("Thank you!\n");

Answer

Output:

Jai Sriman Narayana
Jai Sriman Narayana
Jai Sriman Narayana
Jai Sriman Narayana
Thank you!

Explanation

Initially, the value of k is 1.

The loop condition is k < 5.

Therefore, “Jai Sriman Narayana” is printed 4 times.

After exiting the loop, the statement

printf("Thank you!\n");

is executed, so “Thank you!” is printed.

Q.3. What will the following code fragment produce?

int k = 1;
while (k < 5)
{
    printf("Have a nice day\n");
    k += 2;
}
printf("Thank you!\n");

Answer.
Output:

Have a nice day
Have a nice day
Thank you!

Explanation:

Hence, “Have a nice day” is printed 2 times.

(Note that the value of k increases by 2 in each iteration of the loop.)

Q.4. What will be the output –

int i = 4;
while (i < 12)
{
    printf("Namaste!\n");
    printf("Have a good day\n");
    i += 3;
}
printf("Here now!\n");

Answer:
Output –

Namaste!
Have a good day
Namaste!
Have a good day
Namaste!
Have a good day
Here now!

Explanation

Note: The value of i starts at 4, and increases by 3 in each iteration of the loop.

In this lesson, we played around with various aspects of the while loop, such as the initial value of the loop counter, the loop condition, and the increment value. We saw how our output changes when we change these things.