How do you declare a variable?

How do you declare a variable in C?

Variable Declaration in C You will use the keyword extern to declare a variable at any place. Though you can declare a variable multiple times in your C program, it can be defined only once in a file, a function, or a block of code.

How do you declare a variable in a computer?

When you assign a variable, you use the = symbol. The name of the variable goes on the left and the value you want to store in the variable goes on the right. Here we've assigned the value 'Joe' , which is a string, to the variable first_name . Now if we want to reference that variable, we can.

How do you declare a variable in Java?

To declare a variable in Java, all that is needed is the data type followed by the variable name: int numberOfDays; In the above example, a variable called "numberOfDays" has been declared with a data type of int. Notice how the line ends with a semi-colon.