strncmp() function compares the characters of two strings up to the specified length.
The characters of the strings may be in lower case or upper case, this function discriminates between them.
Every character holds an ASCII value (an integer ranging from 0 to 127). For example, 'A' holds the ASCII value of 65 and 'a' holds the ASCII value of 97. So, in the comparison between two strings, their ASCII values are compared.
strncmp() function starts comparison character by character starting from the first character until the characters in both strings are equal, reached the specified length, or a NULL character is encountered.
This function is defined in <cstring> header file.
|str1||Required||Specifies the string 1|
|str2||Required||Specifies the string 2|
|n||Required||Specifies the length up to which the characters in the strings are compared.|
This function returns the numeric difference between the ASCII values of non-matching characters.
|+ive||If str1 is greater than str2|
|0||If str1 is equal to str2|
|-ive||If str1 is less than str2|