Program: A set of special instructions to tell the computer what tasks to perform.

Computer Language: The rules for a valid format and combinations of instructions (sometimes referred to as syntax).

Statement: In a computer language a group of words, numbers, and operators that perform a specific task: a = b * 2;

a and b - variables: symbolic placeholders for values.

2 - literal value - because it stands alone without being stored in a variable.

= and * - operators - they perform actions with values and variables such as assignments and mathematic multiplications.

Expressions: Statements are made up of one or more expressions. An expression is any reference to a variable or value, or a set of variables and values combined with operators.

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Basics