how to check where the last char is in a string c

To check where the last character is in a string in C, you can use the strlen function to get the length of the string and then subtract 1 to get the index of the last character. Here are the steps:

1. Include the necessary header file: c #include <string.h>

2. Declare a string variable and assign a value to it: c char str[] = "Hello, World!";

3. Get the length of the string using the strlen function: c size_t length = strlen(str);

4. Subtract 1 from the length to get the index of the last character: c size_t lastIndex = length - 1;

Now, the variable lastIndex will contain the index of the last character in the string. You can access the last character using str[lastIndex].

Note: The strlen function returns the length of the string excluding the null terminator character ('\0'). Therefore, when subtracting 1 from the length, you get the index of the last character in the string.