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The______ function returns the number of characters that are present before the terminating null character.
- a)strlength()
- b)strlen()
- c)strlent()
- d)strchr()
Correct answer is option 'B'. Can you explain this answer?
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The______ function returns the number of characters that are present b...
The strlen() function is used to return the number of characters that are present before the terminating null character.size-t strlen(const char *s);The length of the string pointed to by s is computed by strlen().
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The______ function returns the number of characters that are present b...
Explanation:
The correct answer is option B, `strlen()`. The `strlen()` function is a string function in the C programming language that is used to find the length of a string. It returns the number of characters that are present before the terminating null character.
Here is a detailed explanation:
1. String Length:
- In C programming, a string is an array of characters that is terminated by a null character ('\0').
- The length of a string is the number of characters it contains before the null character.
- The `strlen()` function is used to determine the length of a string.
2. Syntax:
- The `strlen()` function is declared in the `` header file.
- The syntax of the `strlen()` function is as follows:
`size_t strlen(const char *str);`
3. Parameters:
- The `strlen()` function takes a single parameter, `str`, which is a pointer to the string whose length is to be determined.
- The parameter `str` should be a null-terminated string.
4. Return Value:
- The `strlen()` function returns the length of the string as a `size_t` value, which is an unsigned integer type.
5. Example:
- Here is an example to demonstrate the usage of the `strlen()` function:
```
#include
#include
int main() {
char str[] = "Hello, World!";
size_t length = strlen(str);
printf("Length of the string: %zu\n", length);
return 0;
}
```
Output:
```
Length of the string: 13
```
- In the above example, the `strlen()` function is used to find the length of the string `str`. Since the string contains 13 characters before the null character, the output is `13`.
Summary:
- The `strlen()` function in C returns the number of characters that are present before the terminating null character in a string.
The correct answer is option B, `strlen()`. The `strlen()` function is a string function in the C programming language that is used to find the length of a string. It returns the number of characters that are present before the terminating null character.
Here is a detailed explanation:
1. String Length:
- In C programming, a string is an array of characters that is terminated by a null character ('\0').
- The length of a string is the number of characters it contains before the null character.
- The `strlen()` function is used to determine the length of a string.
2. Syntax:
- The `strlen()` function is declared in the `
- The syntax of the `strlen()` function is as follows:
`size_t strlen(const char *str);`
3. Parameters:
- The `strlen()` function takes a single parameter, `str`, which is a pointer to the string whose length is to be determined.
- The parameter `str` should be a null-terminated string.
4. Return Value:
- The `strlen()` function returns the length of the string as a `size_t` value, which is an unsigned integer type.
5. Example:
- Here is an example to demonstrate the usage of the `strlen()` function:
```
#include
#include
int main() {
char str[] = "Hello, World!";
size_t length = strlen(str);
printf("Length of the string: %zu\n", length);
return 0;
}
```
Output:
```
Length of the string: 13
```
- In the above example, the `strlen()` function is used to find the length of the string `str`. Since the string contains 13 characters before the null character, the output is `13`.
Summary:
- The `strlen()` function in C returns the number of characters that are present before the terminating null character in a string.
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