Insertion_Sort

### Algorithm
To sort an array of size n in ascending order:
1: Iterate from arr[1] to arr[n] over the array.
2: Compare the current element (key) to its predecessor.
3: If the key element is smaller than its predecessor, compare it to the elements before. Move the greater elements one position up to make space for the swapped element.

### Program

//START of the CODE

#include <bits/stdc++.h> 
using namespace std; 

/* Function to sort an array using insertion sort*/
void insertionSort(int arr[], int n) 
{ 
	int i, key, j; 
	for (i = 1; i < n; i++) 
	{ 
		key = arr[i]; 
		j = i - 1; 

		/* Move elements of arr[0..i-1], that are 
		greater than key, to one position ahead 
		of their current position */
		while (j >= 0 && arr[j] > key) 
		{ 
			arr[j + 1] = arr[j]; 
			j = j - 1; 
		} 
		arr[j + 1] = key; 
	} 
} 


// function to print an array of size n 
void printArray(int arr[], int n) 
{ 
	int i; 
	for (i = 0; i < n; i++) 
		cout << arr[i] << " "; 
	cout << endl; 
} 

int main() 
{ 
	int arr[] = { 12, 11, 13, 5, 6 }; 
	int n = sizeof(arr) / sizeof(arr[0]); 

	insertionSort(arr, n); 
	printArray(arr, n); 

	return 0; 
} 
// END of the CODE