In this program sum and average of of the given numbers are calculated using do-while loop.

Do-while loop is a looping condition where statements are executed continuously until the condition validates and test the condition after having executed the statements within the loop.

This means that do-while would execute its statements at least once, even if the condition fails for the first time.

Scanf() command is used here to allow enter the numbers and sum=sum+num; to sum the numbers within do-while loop.

### C Program to Find the Sum and Average of Numbers Using Do-While Loop

**Steps:**

- Declare three floats sum, avg and num and initialize sum with 0.
- Print the message on the screen to enter how many numbers want to find sum.
- Use do-while loop to insert the numbers calculate the sum and average.

**Code:**

#include<stdio.h> #include<conio.h> void main() { int i=0,n; float sum, avg, num; clrscr(); sum=0; printf("How many numbers you want to find sum and average\n"); scanf("%d",&n); printf("Enter the numbers\n"); do{ scanf("%f", &num); sum=sum+num; i++; } while (i<n); avg=sum/n; printf("Sum=%f\n", sum); printf("Average=%f\n", avg); getch(); }