# WAP in C to sort a 1-d array using insertion sort technique

The Program in C to sort a 1-d array using insertion sort technique is given below:

``````#include <stdio.h>

void insertionSort(int arr[], int n)
{
int i, key, j;
for (i = 1; i < n; i++)
{
key = arr[i];
j = i-1;
while (j >= 0 && arr[j] > key)
{
arr[j+1] = arr[j];
j = j-1;
}
arr[j+1] = key;
}
}

int main()
{
int arr[] = {64, 25, 12, 22, 11};
int n = sizeof(arr)/sizeof(arr[0]);

insertionSort(arr, n);

printf("Sorted array: \n");
for (int i=0; i < n; i++)
printf("%d ", arr[i]);

return 0;
}
``````

Sorted array:
11 12 22 25 64

## Pro-Tips💡

This code defines a function called “insertionSort” that takes an array and its size as input and sorts the array using the insertion sort algorithm.

The main function then declares an unsorted array of integers and calls the insertionSort function on it.

Finally, the sorted array is printed out.

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