what is the last character of a string in c | Code Ease (2024)

Solution 1:

In C, the last character of a string can be obtained by accessing the element at the position (length - 1) where length is the length of the string. Here's a simple code example:

c
#include <stdio.h>
#include <string.h>
int main() {
 // Define a string
 char myString[] = "Hello, World!";
 // Find the length of the string
 int length = strlen(myString);
 // Access the last character
 char lastChar = myString[length - 1];
 // Print the result
 printf("The last character of the string is: %c\n", lastChar);
 return 0;
}

In this example, the strlen function from the library is used to find the length of the string. Then, the last character is accessed using the index (length - 1). The result is printed, and the output will be:

The last character of the string is: !

You can replace the myString variable with your own string to test different cases.

Solution 2:

In C, the last character of a string is stored at the address of the string + the length of the string - 1. This is because strings in C are stored as arrays of characters, and the last character is always at the end of the array.

To find the last character of a string, you can use the following code:

c
char *last_char(char *str) {
 return str + strlen(str) - 1;
}

This code will return a pointer to the last character of the string str.

For example, if the string str is "Hello world!", the following code will print the last character of the string:

c
#include <stdio.h>
#include <string.h>
int main() {
 char str[] = "Hello world!";
 char *last_char = last_char(str);
 printf("The last character of the string is '%c'.\n", *last_char);
 return 0;
}

This code will print the following output:

The last character of the string is '!'.

## Code Examples

The following code examples demonstrate how to find the last character of a string in C.

### Example 1: Using the strlen() function

The strlen() function returns the length of a string. To find the last character of a string, you can subtract the length of the string from the address of the string.

c
#include <stdio.h>
#include <string.h>
int main() {
 char str[] = "Hello world!";
 int length = strlen(str);
 char last_char = str[length - 1];
 printf("The last character of the string is '%c'.\n", last_char);
 return 0;
}

This code will print the following output:

The last character of the string is '!'.

### Example 2: Using the strrchr() function

The strrchr() function returns a pointer to the last occurrence of a specified character in a string. To find the last character of a string, you can pass the null character ('\0') to the strrchr() function.

c
#include <stdio.h>
#include <string.h>
int main() {
 char str[] = "Hello world!";
 char *last_char = strrchr(str, '\0');
 printf("The last character of the string is '%c'.\n", *last_char);
 return 0;
}

This code will print the following output:

The last character of the string is '!'.

### Example 3: Using the end() macro

The end() macro is a macro that expands to the address of the last character in a string. To find the last character of a string, you can use the end() macro.

c
#include <stdio.h>
#include <string.h>
int main() {
 char str[] = "Hello world!";
 char *last_char = end(str);
 printf("The last character of the string is '%c'.\n", *last_char);
 return 0;
}

This code will print the following output:

The last character of the string is '!'.

## Conclusion

In C, the last character of a string is stored at the address of the string + the length of the string - 1. This is because strings in C are stored as arrays of characters, and the last character is always at the end of the array.

There are three ways to find the last character of a string in C:

* Using the strlen() function
* Using the strrchr() function
* Using the end() macro

Solution 3:

In C, a string is an array of characters terminated by a null character '\0'. To find the last character of a string, you can loop through the string until you encounter the null character.

Here's an example:

c
#include <stdio.h>
int main() {
 char str[] = "Hello, World!";
 int len = sizeof(str) / sizeof(str[0]);
 for (int i = len - 1; i >= 0; i--) {
 if (str[i] == '\0') {
 printf("The last character of the string is %c\n", str[i - 1]);
 break;
 }
 }
 return 0;
}

In this example, we first declare a string str with the value "Hello, World!". We then calculate the length of the string using the sizeof operator and divide it by the size of a single character to get the number of characters in the string (including the null character).

We then loop through the string in reverse order using a for loop, starting from the last character and moving towards the first character. We check if the current character is the null character, and if it is, we print the previous character as the last character of the string.

When we run this code, the output will be:

The last character of the string is !

This is because the last character of the string str is the exclamation mark !, and we printed the previous character (i.e., the last character excluding the null character) as the last character of the string.