C program to find sum and average of 3 and 5 numbers; In this tutorial, you will learn how to find sum and average of 3 and 5 numbers in c.

## Algorithm and Programs to Find Sum and Average of 3, 5 Number in C

Let’s use the following algorithm and program to print sum and average of 3 numbers in c:

- Algorithm of find sum and average of three or five numbers
- C Program to Find Sum and Average of 3 Number
- C Program to Find Sum and Average of 5 Number

### Algorithm of find sum and average of three or 5 numbers

- Step 1: Start
- Step 2: Read the three or five numbers from the user.
- Step 3: Declared a variables “Avg” and “Sum”.
- Step 4: Calculate sum and average of 3 or 5 numbers using the followig formulas:
- sum = (a+b+c);
- avg = (a+b+c)/3;
- sum = (a+b+c+e+f);
- avg = (a+b+c+e+f)/3;

- Step 5:Display “sum ” and “Avg”.
- Step 6:End.

### C Program to Find Sum and Average of 3 Number

```
#include<stdio.h>
int main()
{
float a,b,c,avg,sum;
printf("Please enter 3 numbers ");
scanf("%f%f%f", &a, &b, &c);
sum=(a+b+c);
avg=sum/3;
printf("\Sum is %f",sum);
printf("\nAverage is %f",avg);
return 0;
}
```

**The output of the above c program; as follows:**

Please enter 3 numbers 1 2 3 Sum is 6.000000 Average is 2.000000

### C Program to Find Sum and Average of 5 Number

```
#include<stdio.h>
int main() {
float a, b, c, d, e, s, avg;
printf("Please Enter 5 Numbers :");
scanf("%f%f%f%f%f", &a, &b, &c, &d, &e);
s = a + b + c + d + e;
avg = s / 5;
printf("\nThe Sum is :%f", s);
printf("\nThe Average is :%f", avg);
return 0;
}
```

**The output of the above c program; as follows:**

Please Enter 5 Numbers :1 2 3 4 5 The Sum is :15.000000 The Average is :3.000000