do-while loop-:

do-while is a condition control loop.The do-while loop is used to carry out looping operation,in which a statement or group of statements is/are executed repetitively until some logical condition has been satisfied.
do-while is also called "exit-control loop",because in do-while loop first the statement get executed and then the condition is checked,hence the do-while always execute at least one's.

In the do-while loop, there must be at least one such statement within the body of loop which changes the looping condition,during the execution of loop otherwise an infinite loop may occur.

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Syntax-:
do
    statement;
    while(condition);
or,
do
   {statement-1;
     statement-2;
     -
     -
     statement-n;
     }while(condition);
Example-:
Write a program to find sum of series of terms: 2+4+6+8+ - - -n
#include<stdio.h>
#include<conio.h>
main()
{int i=1,term=0,s=0;
  printf("Enter the term");
  scanf("%d",&term);
  do{s=s+(2*i);
          i++;
       }while(i<=term);
  printf("\n sum=%d",s);
  getch();
}
Output-:Enter the term 3
               sum=12

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