Python – Introduction
Introduction: Types of applications: Standalone apps: Web apps: Download python: Python is used to develop both Standalone and Web applications:
Python
Python – Translators
Translators: Compiler: Note: Java programming language use compilation class Program{ public static void main(String[] args) { int a=10; System.out.println(“a val : ” + a); int b=20; System.out.println(“b val : ” + b); System.out.println(“c val : ” + c); }} Compile: Error @ line – 11 (variable “c” not present) Interpreter: Note: Python programming uses interpretation …
Python – Proramming and Scripting
Python(Programming & Scripting): Program: Script: JavaScript: <!doctype html><html> <head> <title> Java Scripting </title> </head> <body> <script> alert(“Hi I am Java Script Function”); alert(“I can run only from HTML code”); </script> </body></html>
Python – Dynamic Programming Language
Python is Dynamic: Static memory: Dynamic memory: In Python, object location changes every time when we modify the data. >>> a=10>>> print(a)10>>> print(“Address :”,id(a))Address : 1628169120 >>> a=a+15>>> print(a)25>>> print(“Address :”,id(a))Address : 1628169360 >>> a=”python”>>> print(a)python>>> print(“Address :”,id(a))Address : 48576832
Python – Variables
Variables: Note: In Python, no need to specify the data type in variable declaration
Python – IDLE
IDLE: Opening IDLE: Shell Window:
Python – Operators – Arithmetic Operators
Operator: Arithmetic operators: print(“Arithmetic operations”)print(“5+2 :”, 5+2)print(“5-2 :”, 5-2)print(“5*2 :”, 5*2)print(“5/2 :”, 5/2)print(“5%2 :”, 5%2)print(“5//2 :”, 5//2)print(“5**2 :”, 5**2) int a=10; a=20;a=30;a=40;a=50;print(a); int a=5; a=a+1;a=a+1;a=a+1;a=a+1;print(a); int a=5; a=a+1;a=a+2;a=a+3;a=a+4;print(a); int a=15; a=a+5;a=a+4;a=a+3;a=a+4;print(a); int a=5, x=1; a=a+x;x = x+1;a=a+x;x = x+1; a=a+x;x = x+1;a=a+x;print(a, x); int a=5, b=5; a=a+b;b = b-1;a=a+b;b= b-1; a=a+b;b = b-1;a=a+b;print(a, b); int n=2; int s=n*n;print(s); int n=2; int c=n*n*n;print(c); int n=2; int s=n*n;int …
Python – input() function
Reading input from End-user : print(“Enter your name :”)name = input()print(“Hello,”,name) Note: We can give the prompt while reading input name = input(“Enter your name : “)print(“Hello,”,name) Note: Every input value will be returned in String format only. print(“Enter 2 numbers :”)a = input()b = input()c = a+b # “5” + “6” = “56”print(“Sum :”,c) …
Python – Data Conversion Functions
int( ) : >>> int(10)10>>> int(23.45)23>>> int(True)1>>> int(False)0>>> int(“45”)45>>> int(“python”) # Error : Invalid input Adding 2 numbers: print(“Enter 2 numbers :”)a = input()b = input()c = int(a)+int(b)print(“Sum :”,c) We can give the prompt directly while calling input() function. x = int(input(“First Num :”))y = int(input(“Second Num :”))print(“Sum : “,x+y) float() : >>> float(2.3)2.3>>> float(5)5.0>>> …
Python – Relational Operators
Relational operators: print(“Relational operations”)print(“5>3 :”, 5>3)print(“5==3 :”, 5==3)print(“5<3 :”, 5<3)print(“5!=3 :”, 5!=3)print(“5>=3 :”, 5>=3)print(“5<=3 :”, 5<=3) Condition to check the number is Positive Condition to check the number is equal to zero Condition to check the 2 numbers equal Condition to check First Num greater than Second Num Square of First Number not equals to …