What is the symbol for whitespace in C

Question

I am trying to figure out how to check if a character is equal to white-space in C  I know that tabs are   t  and newlines are   n   but I want to be able to check for just a regular normal space  from the space-bar  inside of an if statement   Does anybody know what is the character for this

User · Answer

To check a space symbol you can use the following approach

if ( c == ' ' ) { /*...*/ }

To check a space and/or a tab symbol (standard blank characters) you can use the following approach

#include <ctype.h>

//...

if ( isblank( c ) ) { /*...*/ }

To check a white space you can use the following approach

#include <ctype.h>

//...

if ( isspace( c ) ) { /*...*/ }

User · Answer

make use of isspace function       The C library function int isspace int c  checks whether the passed   character is white-space    sample code       int main                 char var               if  isspace var                       printf  var1     c  is a white-space character n   var               instead you can easily compare character with                          Standard white-space characters are -         0x20     space  SPC    t      0x09   horizontal tab  TAB    n      0x0a   newline  LF    v      0x0b   vertical tab  VT    f      0x0c   feed  FF    r      0x0d   carriage return  CR     source   tutorialpoint

User · Answer

There is no particular symbol for whitespace  It is actually a set of some characters which are            space    t      horizontal tab    n      newline   v      vertical tab    f      feed    r      carriage return       Use isspace standard library function from ctype h if you want to check for any of these white-spaces     For just a space  use

User · Answer

include  lt stdio h gt  main     int c sp tb nl  sp   0  tb   0  nl   0  while  c   getchar       EOF       switch  c        case                sp       printf  space  d n   sp        break     case    t             tb       printf  tab  d n   tb        break     case   n             nl       printf  new line  d n   nl        break

User · Answer

The character representation of a Space is simply        void foo  const char  s        unsigned char c              if  c                         But if you are really looking for all whitespace  then C has a function  actually it s often a macro  for that    include  lt ctype h gt       void foo  const char  s        char c              if  isspace c                   You can read about isspace here  If you really want to catch all non-printing characters  the function to use is isprint from the same library  This deals with all of the characters below 0x20  the ASCII code for a space  and above 0x7E  0x7f is the code for DEL  and everything above that is an extension    In raw code this is equivalent to   if  c  lt         c  gt   0x7f         Deal with non-printing characters

User · Answer

The ASCII value of Space is 32  So you can compare your char to the octal value of 32 which is 40 or its hexadecimal value which is 20   if c      40            or  if c      x20            Any number after the   is assumed to be octal  if the character just after   is not x  in which case it is considered to be a hexadecimal

User · Answer

No special escape sequence is required  you can just type the space directly   if  char i want to test                   Do something because it is space     In ASCII  space is code 32  so you could specify space by   x20  or even 32  but you really shouldn t do that   Aside  the word  whitespace  is a catch all for space  tab  newline  and all of that  When you re referring specifically to the ordinary space character  you shouldn t use the term

[c] What is the symbol for whitespace in C?

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