Do While Loop in C++


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do-while in C++

A do-while loop is similar to a while loop, except that a do-while loop is execute at least one time.

A do while loop is a control flow statement that executes a block of code at least once, and then repeatedly executes the block, or not, depending on a given condition at the end of the block (in while).

Syntax

do
{
Statements;
........
Increment or Decrements (++ or --)
}
while(condition);

Flow Diagram

Do While Loop

When use Do-While Loop

When you need to executes a block of code at least once, at that time do-while loop is use.

Example of do..while loop

#include<iostream.h>
#include<conio.h>

void main()
{
int i;
clrscr();
i=1;
do
{
cout<<endl<<i;
i++;
}
while(i<5);
getch();
}

Output

1
2
3
4

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