# C Program to Calculate Standard Deviation

C program to find standard deviation; Through this tutorial, we will learn how to find the standard deviation in c program.

## Programs to Calculate Standard Deviation in C

• C Program to Find Standard Deviation
• C Program to Find Standard Deviation using Function

### C Program to Find Standard Deviation

```/* Standard Deviation - Calculate standard deviation of n numbers */

#include  <stdio.h>
#include  <math.h>

void  main()
{
int  i, n, x[50] ;
float  avg, std, sum = 0, s = 0 ;
printf("Enter the number of elements: ") ;
scanf("%d", &n) ;
printf("Enter the elements:\n") ;
for(i=0 ; i<n ; i++)
{
scanf("%d", &x[i]) ;
sum=sum+x[i] ;
}
avg=sum/n ;
for(i=0 ; i<n ; i++)
s = s + pow(x[i]-avg, 2) ;
std = sqrt(s/n) ;
printf("The standard deviation of given numbers is %f",std);
return 0;
}```

The output of the above c program; as follows:

```Enter the number of elements: 5
Enter the elements:
1
2
3
4
5
The standard deviation of given numbers is 1.414214```

### C Program to Find Standard Deviation using Function

```// SD of a population
#include <math.h>
#include <stdio.h>
float calculateSD(float data[], int n);
int main() {
int i, n;
float data[50];
printf("Enter the number of elements: ") ;
scanf("%d", &n) ;
printf("Enter the elements:\n") ;
for (i = 0; i < n; ++i)
scanf("%f", &data[i]);
printf("\nStandard Deviation = %.6f", calculateSD(data, n));
return 0;
}

float calculateSD(float data[], int n) {
float sum = 0.0, mean, SD = 0.0;
int i;
for (i = 0; i < n; ++i) {
sum += data[i];
}
mean = sum / n;
for (i = 0; i < n; ++i) {
SD += pow(data[i] - mean, 2);
}
return sqrt(SD / n);
}
```

The output of the above c program; as follows:

```Enter the number of elements: 5
Enter the elements:
1
2
3
4
5
Standard Deviation = 1.414214```

## AuthorAdmin

Greetings, I'm Devendra Dode, a full-stack developer, entrepreneur, and the proud owner of Tutsmake.com. My passion lies in crafting informative tutorials and offering valuable tips to assist fellow developers on their coding journey. Within my content, I cover a spectrum of technologies, including PHP, Python, JavaScript, jQuery, Laravel, Livewire, CodeIgniter, Node.js, Express.js, Vue.js, Angular.js, React.js, MySQL, MongoDB, REST APIs, Windows, XAMPP, Linux, Ubuntu, Amazon AWS, Composer, SEO, WordPress, SSL, and Bootstrap. Whether you're starting out or looking for advanced examples, I provide step-by-step guides and practical demonstrations to make your learning experience seamless. Let's explore the diverse realms of coding together.