strcasecmp() — Compare Strings without Case Sensitivity
Format
#include <strings.h>
int strcasecmp(const char *string1, const char *string2);
Language Level
XPG4
Threadsafe
Yes
Locale Sensitive
The behavior of this function might be affected by the LC_CTYPE category of the current locale. This function is not available when LOCALETYPE(*CLD) is specified on the compilation command. For more information, see Understanding CCSIDs and Locales.
Description
The strcasecmp()
function
compares string1 and string2 without sensitivity to
case. All alphabetic characters in string1 and string2 are
converted to lowercase before comparison.
The strcasecmp()
function operates on
null terminated strings. The string arguments to the function are
expected to contain a null character ('\0')
marking
the end of the string.
Return Value
The strcasecmp()
function
returns a value indicating the relationship between the two strings,
as follows:
Value | Meaning |
---|---|
Less than 0 | string1 less than string2 |
0 | string1 equivalent to string2 |
Greater than 0 | string1 greater than string2 |
Example
This example uses
strcasecmp()
to
compare two strings. #include <stdio.h>
#include <strings.h>
int main(void)
{
char_t *str1 = "STRING";
char_t *str2 = "string";
int result;
result = strcasecmp(str1, str2);
if (result == 0)
printf("Strings compared equal.\n");
else if (result < 0)
printf("\"%s\" is less than \"%s\".\n", str1, str2);
else
printf("\"%s\" is greater than \"%s\".\n", str1, str2);
return 0;
}
/******** The output should be similar to: ***************
Strings compared equal.
***********************************/
Related Information
- strncasecmp() — Compare Strings without Case Sensitivity
- strncmp() — Compare Strings
- stricmp() — Compare Strings without Case Sensitivity
- wcscmp() — Compare Wide-Character Strings
- wcsncmp() — Compare Wide-Character Strings
- __wcsicmp() — Compare Wide Character Strings without Case Sensitivity
- __wcsnicmp() — Compare Wide Character Strings without Case Sensitivity
- <strings.h>