Constants in C programming types of Constants in C
What are Constants in C programming
Constants is a such data type, value of constants fixed and do not change throughout the program, If programmer use constants data type in any c program and the value of constant will not change during program execution, programmer specify the values of constants in a c program and compiler know the these constants value you can not change the value constant during program run time.
Types of Constants in C programing
There are basic two type of constants in c programing, Numeric Constants and Character Constants.
Numeric Constants :
Numeric constants further divided in two type Integer and Floating Real Constants
Integer Constants are sequence of digits and have type of Decimal, Octal and Hexadecimal.
Rules for Integer constants
234 is valid Constants
26,100 is not valid Constants comma not allowed
$123 in not valid Constants special character not allowed
27 200 this not valid constants space is not allowed
36 , 4857 is valid constants
Floating Real Constants having fractional part and these can be in exponential form.
15.12 is valid constants
12.10.25 in not valid constants
Character Constants
Character Constants further divided in Single Character Constants and String Constants
Single Character Constants are enclosed in single quotation mark
example : ‘a’ ‘b’ ‘c’ ‘@’ ‘,’
‘a’ = 25
‘A’ = 45
‘5’ is also single character constant
5 in not equal to ‘5’ because ‘5’ is a character constants and 5 is a numeric constant
and ‘/0’ this is backslash zero constant having different in c programming language
there are single Character constant in c