ctype/ctype.h File Reference

Character manipulation. More...

Functions
int	isalnum (int c)
int	isalpha (int c)
int	iscntrl (int c)
int	isdigit (int c)
int	isgraph (int c)
int	islower (int c)
int	isprint (int c)
int	ispunct (int c)
int	isspace (int c)
int	isupper (int c)
int	isxdigit (int c)
int	toupper (int c)
int	tolower (int c)

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Detailed Description

Character manipulation.

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Function Documentation

int isalnum (  int  c  )

Is a letter or a digit?

int isalpha (  int  c  )

Is a letter?

int iscntrl (  int  c  )

Is a control character?

int isdigit (  int  c  )

Is a digit?

int isgraph (  int  c  )

Is a printable character different from a whitespace?

int islower (  int  c  )

Is lowercase letter?

int isprint (  int  c  )

Is a printable character?

int ispunct (  int  c  )

Is a printable character different from a whitespace and being neither a letter nor a digit

int isspace (  int  c  )

Is whitespace?

int isupper (  int  c  )

Is uppercase letter?

int isxdigit (  int  c  )

Is hexa digit?

int tolower (  int  c  )

Conversion to lowercase

int toupper (  int  c  )

Conversion to uppercase

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