The awk command can make it easy to remove duplicate characters from a string even when those characters aren’t sequential, especially when the process is turned into a script. First, the awk command ...

Calculate Frequency of Characters In this article we will learn how to code a C program to calculate frequency of characters in the string. Calculating frequency means to calculate how many times each ...

The goal of this exercise is to convert a string to a new string where each character in the new string is "(" if that character appears only once in the original string, or ")" if that character ...