strcasecmp Function: Case-Insensitive String Comparison in C/C++

strcasecmp is a function in programming languages such as C and C++ that compares two strings in a case-insensitive manner. It takes two strings as input and returns an integer value indicating the result of the comparison.

The function compares the two strings character by character, starting from the first character. It converts each character to lowercase before comparing. If the strings are equal, it returns 0. If the first string is greater than the second string, it returns a positive value. If the first string is less than the second string, it returns a negative value.

This function is often used when comparing strings in a case-insensitive manner, such as when sorting strings or performing string-based operations where the case of the letters does not matter.