strchr in C

The strchr() function in C is a predefined function in the <string.h> library. It is used to find the first occurrence of a character in a string. It checks whether the given character is present in the given string. If the character is found, it returns the pointer to its first occurrence otherwise, it returns a null pointer, indicating the character is not found in the string.

Syntax of strchr() in C

Parameters of strchr() in C

• str: It is the string in which we have to search the character. This string is a constant character pointer, meaning that the function will not modify the string.
• ch: It is a character to be searched in the string. Though passed as an int, it represents a character and is cast internally. This allows strchr() to be used with character values, including special characters and ASCII values.

Return Value of strchr()

The strchr() function returns a pointer to the first occurrence of the character in the string. If the character is not found, the function returns NULL. Here, the return type is char *, which allows direct access to the character and subsequent characters in the string from the found position.

Example Programs Using strchr() in C

The following examples illustrates how we can use strchr() in various scenarios.

Example 1:

Using strchr() to check the existence of character in a string and print its first occurrence.

Character 's' found at position: 4

Example 2:

Using strchr() function to parse the string until a given delimiter is found.