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The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

C nested do while loop

Using do-while loop within do-while loops is said to be nested do while loop.

nested do while loop Syntax

Let us see how neat a syntax of nested do while loop is

Syntax
do
{
statement n;
do
{
statement n;
}
while(test condition);
}
while(test expression);

C program - nested do while loop

The following example program will clearly explain the concept of nested do while loop

dowhile.c
#include <stdio.h>
int main()
{
do
{
printf("I'm from outer do-while loop ");
do
{
printf("\nI'm from inner do-while loop ");
}
while(1 > 10);
}
while(2 > 10);
return 0;
}
  • I'm from outer do-while loop
  • I'm from inner do-while loop

Note:

Simply, the outer do-while loop contains the inner do-while loop as a set of statements. Though, the test conditions of inner and outer do-while loops are false for the first time. Both the inner and outer statements of do-while loops are executed once, irrespective of their test conditions.

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