A constant is an expression that has a fixed value. They can be divided into integer, decimal, floating-point, character or string constants depending on their data type.
Apart from the decimal, C++ also supports two more constants i.e. octal (to the base 8) and hexadecimal (to the base 16) constants.
Examples of Constants:
75 //integer (decimal)
0113 //octal
0x4b //hexadecimal
3.142 //floating point
‘c’ //character constant
“Hello, World” //string constant
Note: When we have to represent a single character, we use single quotes and when we want to define a constant with more than one character, we use double-quotes.
