C

Trimming whitespace from a string is an essential operation in text processing. Often, user input or data from files contains unwanted spaces at the beginning or end of a string. Removing these spaces is necessary for proper formatting, comparison, or storage. In C, strings are arrays of characters ending with a null terminator (\0). By […]

Removing characters from a string is a common operation in text processing, data cleaning, and formatting tasks. In C, strings are arrays of characters ending with a null terminator (\0). By scanning the string and selectively skipping unwanted characters, you can produce a cleaned-up version of the text. In this tutorial, we will learn how

Converting a string to lowercase is a very common operation in C programming. Normally, you might use the strlwr() function, but like strupr(), it is not part of the standard C library and may not work in every compiler. That is why it is useful to know how to implement this operation manually. Understanding lowercase

Converting a string to uppercase is a common task in C programming. Normally, you can use the strupr() function, but it is not part of the C standard library and may not be available in all compilers. For this reason, it is useful to know how to convert a string to uppercase manually. Understanding how

Arrays are one of the most important data structures in C. They allow you to store multiple values of the same type in contiguous memory locations. While array elements are usually accessed using indices, pointers provide an alternative that is more flexible and can be used for advanced memory operations. Using pointers to access array

Counting the frequency of words in a string is a fundamental task in text processing, useful in applications like word counters, text analytics, and data mining. In C, this task requires handling strings as arrays of characters, parsing words, and keeping track of their occurrences. This tutorial will guide you through multiple methods to calculate

Removing spaces from a string is a common operation in text processing, especially when cleaning input data or preparing text for further analysis. In C, strings are arrays of characters ending with a null terminator (\0). By traversing the string and copying only non-space characters, we can efficiently remove all spaces. In this tutorial, we

Replacing characters in a string is a common operation in programming. It is useful for tasks such as data cleaning, text formatting, or implementing simple encryption. In C, strings are arrays of characters ending with a null terminator (\0). By scanning the string and changing specific characters, you can modify text as needed. In this

Finding the first non-repeating character in a string is a classic problem in programming. It involves examining each character in the string and determining which character appears only once and comes first in order. This problem is a common exercise in coding interviews and helps you practice arrays, loops, and character manipulation in C. In

Counting the occurrences of each character in a string is a common programming task. It helps you analyze text, understand frequency patterns, and build applications such as word counters, text analyzers, and encryption programs. In C, strings are arrays of characters ending with a null terminator (\0). By scanning the string character by character, we