ANSI C Type Library.
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| unsigned short | islower (char character) |
| | The function checks whether the passed character is a lowercase letter. More...
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| unsigned short | isupper (char character) |
| | The function checks whether the passed character is a uppercase letter. More...
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| unsigned short | isalpha (char character) |
| | The function checks whether a character is an alphabet (a to z and A-Z). More...
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| unsigned short | iscntrl (char character) |
| | The function checks whether a character is a control character. More...
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| unsigned short | isdigit (char character) |
| | The function checks if the passed character is a decimal digit character. More...
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| unsigned short | isalnum (char character) |
| | The function checks if the passed character is alphanumeric (cipher or letter). More...
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| unsigned short | isspace (char character) |
| | The function checks whether a character is a white-space character. More...
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| unsigned short | ispunct (char character) |
| | The function checks whether a character is a punctuation mark. More...
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| unsigned short | isgraph (char character) |
| | The function checks whether a character is a graphic character. More...
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| unsigned short | isxdigit (char character) |
| | The function checks whether a character is a hex digit. More...
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| char | tolower (char character) |
| | The function converts a given letter to lowercase. More...
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| char | toupper (char character) |
| | The function converts lowercase letter to uppercase. More...
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ANSI C Type Library provides a set of standard ANSI C library functions for testing and mapping characters.
◆ islower()
| unsigned short islower |
( |
char |
character | ) |
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The function checks whether the passed character is a lowercase letter.
- Parameters
-
| [in] | character | This is the character to be checked. |
- Returns
- Returns true if the given character is a lowercase letter.
◆ isupper()
| unsigned short isupper |
( |
char |
character | ) |
|
The function checks whether the passed character is a uppercase letter.
- Parameters
-
| [in] | character | This is the character to be checked. |
- Returns
- Returns true if the given character is a UPPERCASE letter
◆ isalpha()
| unsigned short isalpha |
( |
char |
character | ) |
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The function checks whether a character is an alphabet (a to z and A-Z).
- Parameters
-
| [in] | character | This is the character to be checked. |
- Returns
- Returns true if the given character is a letter.
◆ iscntrl()
| unsigned short iscntrl |
( |
char |
character | ) |
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The function checks whether a character is a control character.
- Parameters
-
| [in] | character | This is the character to be checked. |
- Returns
- Returns true if the given character is a control character.
◆ isdigit()
| unsigned short isdigit |
( |
char |
character | ) |
|
The function checks if the passed character is a decimal digit character.
- Parameters
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| [in] | character | This is the character to be checked. |
- Returns
- Returns true if the given character is a cipher (digit)
◆ isalnum()
| unsigned short isalnum |
( |
char |
character | ) |
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The function checks if the passed character is alphanumeric (cipher or letter).
- Parameters
-
| [in] | character | This is the character to be checked. |
- Returns
- Returns true if the given character is alphanumeric (cipher or letter).
◆ isspace()
| unsigned short isspace |
( |
char |
character | ) |
|
The function checks whether a character is a white-space character.
- Parameters
-
| [in] | character | This is the character to be checked. |
- Returns
- Returns true if the given character is space or tab.
◆ ispunct()
| unsigned short ispunct |
( |
char |
character | ) |
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The function checks whether a character is a punctuation mark.
- Parameters
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| [in] | character | This is the character to be checked. |
- Returns
- Returns true if the given character is a punctuation mark.
◆ isgraph()
| unsigned short isgraph |
( |
char |
character | ) |
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The function checks whether a character is a graphic character.
- Parameters
-
| [in] | character | This is the character to be checked. |
- Returns
- Returns true if the given character is a graphical character.
◆ isxdigit()
| unsigned short isxdigit |
( |
char |
character | ) |
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The function checks whether a character is a hex digit.
- Parameters
-
| [in] | character | This is the character to be checked. |
- Returns
- Returns true if given character is a hex digit.
◆ tolower()
| char tolower |
( |
char |
character | ) |
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The function converts a given letter to lowercase.
- Parameters
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| [in] | character | This is the letter to be converted to lowercase. |
- Returns
- Returns the same letter passed as a parameter.
◆ toupper()
| char toupper |
( |
char |
character | ) |
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The function converts lowercase letter to uppercase.
- Parameters
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| [in] | character | This is the letter to be converted to uppercase. |
- Returns
- Returns the same letter passed as a parameter.
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