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Function Details : strstr

char *strstr(const char * haystack,const char * needle) ;

Return Type : char *

String pointer (array of characters)

Read about return values of strstr function .

1st Parameter Type : const char *

Pointer to read-only string

1st Parameter

Pointer to the null-terminated string to be searched.

2nd Parameter Type : const char *

Pointer to read-only string

2nd Parameter

Pointer to the null-terminated substring to search for in `haystack`.

Read more about parameters of strstr in parameters section

The strstrfunction in C language Finds the first occurrence of the substring in the string.

The strstr function locates the first occurrence of the null-terminated string needle in the null-terminated string haystack. The terminating null characters are not compared.

The strstrfunction takes 2 parameters:

•
const char * `haystack`: Pointer to the null-terminated string to be searched.
•
const char * `needle`: Pointer to the null-terminated substring to search for in `haystack`.

Searches the string `haystack` for the first occurrence of the substring `needle`. Returns a pointer to the beginning of the found substring in `haystack`, or `NULL` if the substring is not found.

The strstr function return value :

Returns a pointer to the first occurrence of needle in haystack, or NULL if needle is not part of haystack

Output

This example demonstrates basic usage of strstr to find a substring within a string.