Introduction to Data Types and Variables

Answer

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.

Answer

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.

Answer

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

Answer

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.

Answer

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.

Answer

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 …

Answer

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.

Answer

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.