**// Standard Deviations of n number**

**#include <stdio.h>#include <math.h>int main(){ float arr[100],sum=0,mean,sd=0,result; int i,len; printf("Enter the length of array"); scanf("%d",&len); for(i =0; i < len ;i++) { scanf("%f",&arr[i]); sum = sum + arr[i]; } mean = sum / len; printf("%f",sum); printf("%f",mean); for(i=0;i <len;i++){ sd += pow(arr[i] - mean,2); result =sqrt(sd/10); } printf("The Standard devision value is %.6f",result);**

** return 0;}**