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

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

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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

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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

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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

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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

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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  lt ctype h gt          if   isblank  c                   To check a white space you can use the following approach   include  lt ctype h gt          if   isspace  c

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

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