Computer Programming

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

Sorting strings is a fundamental concept in C programming. It is widely used in applications like managing lists of names, words, or other textual data. Sorting helps make data organized and readable, and learning different methods teaches important programming skills such as string manipulation, array handling, pointers, and algorithm design. In this guide, we will

A palindrome is a word, phrase, number, or sequence of characters that reads the same forward and backward. Some common examples are “madam”, “level”, and “radar”. In C programming, checking if a string is a palindrome helps you understand string manipulation, looping, recursion, and pointers. This problem may look simple, but it teaches important concepts

Comparing two strings is one of the most common operations in C programming. Normally, this is done using the standard library function strcmp(), which checks two strings character by character and returns whether they are equal, greater, or smaller. However, learning to compare strings without strcmp() is very useful. It helps you understand how strings

Copying a string is one of the most fundamental operations in C programming. Normally, this task can be done easily using the built-in library function strcpy(). However, writing your own code to copy strings without relying on strcpy() is an excellent way to understand how strings are stored and handled in memory. When you copy

String concatenation means joining two strings together into one. In C, the standard library provides the strcat() function to handle this task easily. However, writing your own program to concatenate strings without using strcat() is a very good practice. It helps you understand how strings are stored in memory and how characters are manipulated one

Reversing a string is a common exercise in C programming that helps beginners understand string manipulation, arrays, and memory access. While the C standard library provides the strrev() function on some platforms, it’s not universally available. Writing your own reverse function strengthens your understanding of how strings are stored and manipulated in memory. In this

Finding the length of a string is one of the most basic tasks in C programming. While the standard library provides the strlen() function for this purpose, understanding how to calculate the length manually is an essential exercise for beginners. This teaches how strings are stored in memory and how to navigate character arrays. In

In array operations, the difference between two arrays A and B is a new array containing all elements that are in A but not in B. This operation is widely used in data analysis, filtering datasets, and solving algorithmic problems. Learning to compute array differences helps programmers manage data efficiently and manipulate collections of values.