toupper
- Updated2023-02-21
- 1 minute(s) read
int toupper (int characterInput);
Purpose
Converts a lowercase letter to an uppercase letter and returns the converted character. If the character to be converted is not an lowercase letter (A-Z) then no conversion is made and the character is returned unchanged. The input to this function should be a character with integer value between 0 and 255.
Parameters
| Input | ||
| Name | Type | Description |
| characterInput | int | Contains the character to be converted. If the character to be converted is not a lowercase letter (a-z), no conversion is made and the character is returned unchanged. The input must be a character with integer value between 0 and 255. |
Return Value
| Name | Type | Description |
| characterOutput | int | Contains the returned converted character. If the character to be converted is not a lowercase letter (a-z), no conversion is made and the character is returned unchanged. |
Additional Information
Library: ANSI C Library
Include file: ansi_c.h
LabWindows/CVI compatibility: LabWindows/CVI 3.0 and later
Example
Refer to userint\keyfiltr.cws for an example of using the toupper function.