Count Frequency of a Number in a Sorted Array

Count Frequency of a Number in a Sorted Array.

Given a sorted array and a number k. We have to write a code to count how many times a number k appears in a sorted array.

For example –

Input: { 1, 4, 7, 8, 8, 11, 11, 11, 11, 12, 13 }, k = 11

Output: 4

In this input array, The number 11 appears Four time.