Getting Started with Java
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This video shows how to create variables and constants in java. Use one of the types byte, int, short, or long to make integer numbers. Use one of the types, float and double to make numbers with decimal points. You can have a float or double variable that stores an integer number but the reverse is not possible without a concept called typecasting. Use the F or f letter at the end of the number when you write a value that you plan to assign to a float variable. Similiarly use the l or L letter at the end of an integer number when you write a value that you plan to assign to a long variable. char variables can store numbers in which case they are printed as letters whose values are obtained by looking for the numbers in the Unicode table.