do while loop in C

The do while loop is a post tested loop. Using the do-while loop, we can repeat the execution of several parts of the statements. The do-while loop is mainly used in the case where we need to execute the loop at least once. The do-while loop is mostly used in menu-driven programs where the termination condition depends upon the end user.

do while loop syntax

The syntax of the C language do-while loop is given below:

Example 1

Output

1. Print Hello
2. Print Javatpoint
3. Exit
1
Hello
do you want to enter more?
y

1. Print Hello
2. Print Javatpoint
3. Exit
2
Javatpoint
do you want to enter more?
n

Flowchart of do while loop

do while example

There is given the simple program of c language do while loop where we are printing the table of 1.

Output

1
2
3
4
5
6
7
8
9
10

Program to print table for the given number using do while loop

Output

Enter a number: 5
5
10
15
20
25
30
35
40
45
50

Enter a number: 10
10
20
30
40
50
60
70
80
90
100

Infinitive do while loop

The do-while loop will run infinite times if we pass any non-zero value as the conditional expression.