CONSTANTS OF C

CONSTANTS  OF  C

A constant is a quantity that doesn’t change in a program. This quantity can be stored at a location in the memory of the computer. ‘C’ constant can be divided into two major categories :

PRIMARY  CONSTANT

        Important Points for defining integer Constant

·        An integer constant must have at least one digit.

·        An integer must not have a decimal point.

·        An integer should be either positive or negative.

·       An integer constant does not allow any commas or blanks.

·       An integer constant allows within range from -  32768  to + 32767.

Important point for defining Real Constants

·     A real constant must have at least one digit.

·     A real constant have a decimal point.

·     A real constant should be either positive or negative.

·     Default sign is positive.

·     A real constant does allow any commas and blanks.

Important point for defining Character Constants

·     The character constant is either a single alphabet, digit or a single inverted commas. For example ‘A’ is not.

·     The maximum length of a character constant can be 1 character.