String Length function in C Examples

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strlen() Function

The strlen() is one of the inbuilt string function in c programming which is used to find the length of the given string.

strlen() C function counts the number of characters present in a string and gives us string length.

C strln() syntax

  
 strlen(str1);


Example 1: Without Using string length function



Output:

 
 W
 E
 L
 C
 O
 M
 -----

Example 2: Using string length function



Output:

 length of Prayag_Verma = 12
 length of Hello World = 5
 ----------------------------


List of String function in C


Functions Description
strcat( ) The strcat() function is used to concatenate one string(source) at the end of another string(destination).
strncat( ) Appends first n characters of a string at the end of another.
strcpy( ) Copies from str2 into str1
strncpy( ) Copies given number of characters of one string to another
strlen( ) Gives the length of str1
strcmp( ) Returns 0 if str1 is same as str2. Returns <0 if strl < str2. Returns >0 if str1 > str2
strcmpi( ) Same as strcmp() function. But, this function negotiates case. “A” and “a” are treated as same.
strchr( ) Returns pointer to first occurrence of char in str1
strrchr( ) last occurrence of given character in a string is found.
strstr( ) Returns pointer to first occurrence of str2 in str1
strrstr( ) Returns pointer to last occurrence of str2 in str1
strdup( ) Duplicates the string
strlwr( ) Converts string to lowercase
strupr( ) Converts string to uppercase
strrev( ) Reverses the given string
strset( ) Sets all character in a string to given character
strnset( ) It sets the portion of characters in a string to given character
strtok( ) Tokenizing given string using delimiter


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