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String Handling Functions in C
C programming language provides a set of pre-defined functions called string handling functions to work with string values. The string handling functions are defined in a header file called string.h. Whenever we want to use any string handling function we must include the header file called string.h.
The following table provides most commonly used string handling function and their use...
| Function | Syntax (or) Example | Description |
|---|---|---|
| strcpy() | strcpy(string1, string2) | Copies string2 value into string1 |
| strncpy() | strncpy(string1, string2, 5) | Copies first 5 characters string2 into string1 |
| strlen() | strlen(string1) | returns total number of characters in string1 |
| strcat() | strcat(string1,string2) | Appends string2 to string1 |
| strncat() | strncpy(string1, string2, 4) | Appends first 4 characters of string2 to string1 |
| strcmp() | strcmp(string1, string2) | Returns 0 if string1 and string2 are the same; less than 0 if string1<string2; greater than 0 if string1>string2 |
| strncmp() | strncmp(string1, string2, 4) | Compares first 4 characters of both string1 and string2 |
| strcmpi() | strcmpi(string1,string2) | Compares two strings, string1 and string2 by ignoring case (upper or lower) |
| stricmp() | stricmp(string1, string2) | Compares two strings, string1 and string2 by ignoring case (similar to strcmpi()) |
| strlwr() | strlwr(string1) | Converts all the characters of string1 to lower case. |
| strupr() | strupr(string1) | Converts all the characters of string1 to upper case. |
| strdup() | string1 = strdup(string2) | Duplicated value of string2 is assigned to string1 |
| strchr() | strchr(string1, 'b') | Returns a pointer to the first occurrence of character 'b' in string1 |
| strrchr() | 'strrchr(string1, 'b') | Returns a pointer to the last occurrence of character 'b' in string1 |
| strstr() | strstr(string1, string2) | Returns a pointer to the first occurrence of string2 in string1 |
| strset() | strset(string1, 'B') | Sets all the characters of string1 to given character 'B'. |
| strnset() | strnset(string1, 'B', 5) | Sets first 5 characters of string1 to given character 'B'. |
| strrev() | strrev(string1) | It reverses the value of string1 |
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