Introduction to Data Types and Variables — Flashcards

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An identifier is a name given to various programming elements such as a variable, function, class, module or any other object. It helps label parts of a program clearly.

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An identifier must begin with an alphabet or underscore. It is case sensitive, cannot be a keyword, can be of any size, and cannot contain blank spaces.

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Variable names are case sensitive. That means num and NUM are treated as two different variables, even though they look similar.

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A variable is a container used to store values for input, intermediate results, or final results in computer memory. A variable is created automatically when a value is assigned to it.

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The assignment operator = is used to assign a value to a variable. Python first evaluates the right-hand side and then assigns the result to the left-hand side.

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An expression has two values: Lvalue and Rvalue. Lvalue is the left-hand side part of the expression, and Rvalue is the right-hand side part. Python evaluates the RHS first and then assigns it to the …

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A statement is any programming instruction given in Python as per syntax. It is used to execute a task and may or may not return a value.

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An expression is a legal combination of symbols, operators and operands that produces a result or value. Unlike a statement, an expression always represents a value.