![]() print (“total = “, R) #output statement.x = input (“enter a number”) #input statement.A value or a standalone variable is also considered as an expression.Ī statement is unit of code that the python interpreter can execute.An expression is combination of different variables, operators and constant which is always evaluated to a value.Different types of operator supported in python are given below:Īrithmetic Operator Relational Operator Assignment Operator Logical Operator Identity Operator Membership Operator Operator Precedence Expressions These are special symbols used to perform specific operation on values. It starts with # (hash sign) in python.It is used add a remark or note in the source code.These are statement ignored by python interpreter during execution.Following table show data types used in python: These are keywords which determine the type of data stored in a variable. In python assignment statement is used to create variable and assign values to it.Value of variable can be numeric, alphanumeric or combination of both.It can be referred as an object or element that occupies memory space which can contain a value.We cannot use special symbols like !, #, $, % etc.it should not be a python keyword or reserved word.It can be of any length but we should keep it simple, short and meaningful.The name should begin with an alphabet or and underscore sign and can be followed by any combination of charaters a-z, A-Z, 0-9 or underscore.Identifiers are name used to identify a variable, function or any other entities in a programs. These are predefined words which a specific meaning to Python Interpreter.Click on ‘Run’ menu and select ‘Run Module’.Click ‘File’ and select ‘New’ to open Script mode.Python scripts are saved as file with extension “.py”.We can save programs (python script) for future use.Allows us to write and execute more than one Instruction together.We cannot save statements for future use.Convenient for testing single line of code.Instant execution of individual statement.We can use Python Interpreter in two ways: To write and run python programs we need Python Interpreter also called Python IDLE. An interpreter processes the instructions one by one. ![]() Interpreter: it is also a program which converts code written in high level language into machine language. Machine Code: set of instructions in form of binary language (0 and 1) which is understood by computerĬompiler: program which converts code written in high level language into machine language Source Code: A program written in High Level Language Instructions : A single step written to carry out an action Practical Questions with Answers Menu Toggle.
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