Saturday 25 February 2012

Keywords in C


Keywords
Keywords are the system defined identifiers.
All keywords have fixed meanings that do not change.
White spaces are not allowed in keywords.
Keyword may not be used as an identifiers.
It is strongly recommended that keywords should be in lower case letters.
There are totally 32(Thirty Two) keywords used in a C programming.
int
float
double
long
short
signed
unsigned
const
if
else
switch
break
default
do
while
for
register
extern
static
struct
typedef
enum
return
sizeof
goto
union
auto
case
void
char
continue
volatile
Escape Sequence Characters (Backslash Character Constants) in C
C supports some special escape sequence characters that are used to do special tasks.These are also called as 'Backslash characters'.
Some of the escape sequence characters are as follow:
Character Constant
Meaning
\n
New line (Line break)
\b
Backspace
\t
Horizontal Tab
\f
Form feed
\a
Alert (alerts a bell)
\r
Carriage Return
\v
Vertical Tab
\?
Question Mark
\'
Single Quote
\''
Double Quote
\\
Backslash
\0
Null

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