To declare (create) a variable, you will specify the type, leave at least one space, then the name for the variable and end the line with a semicolon ( ; ). Java uses the keyword int for integer, double for a floating point number (a double precision number), and boolean for a Boolean value (true or false).
How do you declare variable names?
- All variable names must begin with a letter of the alphabet or an. underscore( _ ). …
- After the first initial letter, variable names can also contain letters and numbers. …
- Uppercase characters are distinct from lowercase characters. …
- You cannot use a C++ keyword (reserved word) as a variable name.
What is use for declaring variables?
A declaration of a variable is where a program says that it needs a variable. For our small programs, place declaration statements between the two braces of the main method. The declaration gives a name and a data type for the variable. It may also ask that a particular value be placed in the variable.
