# Counting Sort in java

Table of Contents

Counting sort is special sorting technique used to sort elements between specific range. Lets say elements belong to range 1 to K , then Counting sort can be used to sort elements in O(N) times.
Basic idea of counting sort to find number of elements less than X, so X can be put to its correct position.

### Steps for Counting Sort:

• Take an array to store count of each elements. Lets say array elements contain 1 to K then initialize count array with K.
• Now add elements of count array, so each elements store summation of its previous elements.
• Modified count array stores position of elements in actual sorted array.
• Iterate over array and put element in correct sequence based on modified count array and reduce the count by 1.

### Java program for counting sort:

When you run above program, you will get below output:
Time Complexity= O(N)

I would suggest to try to debug the program to understand it better.

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