This program calculates the standard deviation of 10 data using arrays.

To understand this example, you should have the knowledge of following C programming topics:

This program calculates the standard deviation of a individual series using arrays. Visit this page to learn about Standard Deviation.

To calculate the standard deviation, `calculateSD()`

function is created. The array containing 10 elements is passed to the function and this function calculates the standard deviation and returns it to the `main()`

function.

```
#include <stdio.h>
#include <math.h>
float calculateSD(float data[]);
int main()
{
int i;
float data[10];
printf("Enter 10 elements: ");
for(i=0; i < 10; ++i)
scanf("%f", &data[i]);
printf("\nStandard Deviation = %.6f", calculateSD(data));
return 0;
}
float calculateSD(float data[])
{
float sum = 0.0, mean, standardDeviation = 0.0;
int i;
for(i=0; i<10; ++i)
{
sum += data[i];
}
mean = sum/10;
for(i=0; i<10; ++i)
standardDeviation += pow(data[i] - mean, 2);
return sqrt(standardDeviation/10);
}
```

**Output**

Enter 10 elements: 1 2 3 4 5 6 7 8 9 10 Standard Deviation = 2.872281