C program to find second smallest number in an array; Through this tutorial, we will learn how to find second smallest number in an array in c program.

## Algorithm to Find Second Smallest Number in an Array

Use the following algorithm to write a program to find second smallest number in an array; as follows:

- Start Program
- Declare an array and some variables.
- Take input the array elements from user.
- Find the smallest element (first_smallest) in the array in the first traversal.
- Find the smallest element (second_smallest) by skipping the first_smallest element.
- Display second_smallest.
- End Program.

## C Program to Find Second Smallest Number in an Array

```
#include <stdio.h>
#include <limits.h>
int main() {
int arr[50], n, i;
//Enter the size of an array
printf("Enter the size of an array (Max 50) \n");
scanf("%d", &n);
printf("Enter an array elements\n");
//Input array values
for(i = 0; i < n; i++) {
scanf("%d", &arr[i]);
}
//Intialize variable with max int value
int smallest = INT_MAX;
int secondSmallest = INT_MAX;
//Traverse an array
for(i = 0; i < n; i++) {
//If element is smaller
if(arr[i] < smallest) {
secondSmallest = smallest;
smallest = arr[i];
}
if(arr[i] > smallest && arr[i] < secondSmallest) {
secondSmallest = arr[i];
}
}
printf("Second smallest %d", secondSmallest);
return 0;
}
```

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

Enter the size of an array (Max 50) 5 Enter an array elements 1 2 4 5 45 Second smallest 2