Python for Beginners Learn Python in 1 Hour Python Programming Tutorial In this Python lesson you ll learn everything you need to start programming in Python This tutorial is perfect for data science machine learning and web development No prior knowledge in Python or programming is required as everything will be taught from scratch What is Python Python is a multipurpose programming language that can be used for a variety of different tasks such as automation web development and data science You can use Python in automation to automate repetitive tasks and save time and increase productivity You need to install a code editor to write your own Python code You can build amazing websites powered by Python Now let s start coding age 30 print age price 19 95 print price Declare and Use Variables in Python Here s a little exercise for you imagine we want to write a program for a hospital so we re going to check in a patient named John Smith He s 20 years old and is a new patient Give yourself a task like this and run the output Receiving User Input in Python In Python we have a built in function called input that we use to read a value from the terminal window We can add a string argument to the function to prompt the user for input Let s write a simple program to demonstrate this name input What is your name print Hello name When we run this program it will prompt the user to input their name Once a value is entered the program will print the greeting message with the input value Data Types in Python There are three main data types in Python numbers strings and booleans Numbers This includes integers and floating point numbers Strings This includes textual data Booleans This includes True and False values Converting Data Types in Python Python has several built in functions for converting the types of our variables For example we have the int function for converting a value to an integer birth year 1982 age 2020 int birth year print You are str age years old In the above example we use the int function to convert the birth year string to an integer so we can subtract it from the current year We also have the float function for converting a value to a float num 10 5 float num float num print float num In the above example we use the float function to convert the num string to a floating point number Type Conversion in Python In programming languages like Python there are times when you need to convert a variable from one type to another In this leeson you ll learn a bunch of cool things you can do with strings using Python for beginners In Python the index of the first character in a string is 0 So when we run this program you re going to see 1 on the terminal because the index is 1 print Hello World 1 Output e The float function is used to convert a string to a float value first float input Enter the first number We can also change this expression to first second which is another way to write this piece of code sequence of characters The lower method is used to convert a string to lowercase or to find a character or a string Hello World print string lower Output hello worldprint string find o Output 4print string replace o a Output Hella Warld The in operator can be used to check if a string contains a character string Python is a programming language for beginners print language in string Output True Arithmetic Operators in Python Python has various arithmetic operators that we can use such as addition subtraction multiplication and division print 10 3 Output 13 We also have an augmented assignment operator in Python that means incrementing a variable by a value x 5x 3 Output 8 Operator precedence in Python is similar to math but we can always use parentheses to change the order of operations x 10 3 2 Output 16 Multiplication and division have a higher order so they are evaluated first That s why the answer is 16 x 10 3 2print x Output 11 5 When we print x we get 11 5 x 3print x Output 14 5 False in the x variable x 1000 Output 1000 When we run x 3 we get 14 5 as the result When we run x 13 it will store Python programmers use comparison operators to evaluate values in Python programs These operators are important for comparing values and evaluat ing certain conditions They help to build complex rules and conditions Another set of important operators are the logical operators used to evaluate complex rules Comparison Operators Python uses comparison operators to evaluate values and build comple x rules The following are comparison operators in Python Equal to Not equal to Greater than Less than Greater than or equal to Less than or equal to Logical Operators And operator and Or operator or Not operator not Python uses logical operators to evaluate complex rules The following are logical operators in Python Python can perform complex evaluations by applying multiple logical and comparison operators to the expressions If Statements If statements in Python are used to make decisions in the program For example you can declare a variable called temperature and depending on its value print different messages on the terminal To represent a block of code in Python we use indentation instead of curly braces If the code is not indented it will not be executed In Python there are three logical operators The logical or operator returns true if at least one of the expressions are true The logical and operator returns true if both the expressions are true The logical not operator inverts any value that it is given Example Let s take an example to understand the usage of these operators temperature 25 if temperature 30 print It s a hot day elif temperature 20 and temperature 30 print It s a nice day elif temperature 10 print It s a bit cold else print It s a cold day In this sample code if the temperature is Greater than 30 it s a hot day Between 20 and 30 it s a nice day Greater than 10 It s a bit cold Less than or equal to 10 it s a cold day Remember the code will only execute if the expression inside the if or elif statements are true If none of the conditions are true the code will not be executed Comments in Python are added using the hash symbol Anything following the hash symbol will be ignored by Python Python Exercise The code is in Python a case sensitive language So we need to convert a given string to uppercase Earlier we talked about string methods We can see all the available functions or methods in a string object by typing dot We use the upper method to convert the string to