Inputs

In previous examples we used fixed (hardcoded) values in programs.
But sometimes we need a value as input from user.
When a value gets read from the user, we store it in a variable.

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Let's write a program that reads a number from the user and outputs its value doubled:

• declare an integer x
• add x block, with variable name x
• output x * 2

For example, if the user enters 9, output should be 18.