Question
Download Solution PDFWhich of the following functions is used to find the length of a string in C?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is: 2) strlen()
Explanation:
In C, the strlen() function (from the <string.h> library) is used to determine the length of a null-terminated string (number of characters excluding the terminating '\0').
Option Analysis
- sizeof() → Returns the size of a variable/type in bytes (not string length).
- length() → Not a standard C function (common in C++ for std::string).
- strlength() → Doesn’t exist in standard C.
Example:
C program:
#include <string.h>
#include <stdio.h>
int main() {
char str[] = "Hello";
printf("Length: %zu", strlen(str)); / Output: 5
return 0;
}
Last updated on Jun 16, 2025
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