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Python 1st lecture

 Q- how to Print Hello World print("Hello World") Variables in python ------- age = 30   #variable should be intutive so that we can learn any time print(age) Note: Shift+Enter is shortcut to run command 2) ' #' this is for writing the comment in python Rules for Variables--- Variable can not be start with any number like - 1age  Number can use in between and end with variable like - age1 age2 Special characters are not allowed expect _ (underscore) like - age_my Space not allowed in variable  Python is case sensitive  Way to define Variable --- age1,age2 = 30,25  age1 = 30 age2 = 25 age1=age2=30   #if 30 age for both variable   >> Data type the type of data is basically data type Integer = age1 to age3 is basically integer   , Integer is basically full number lets check = type(age1)  #it will give u print int float=  basically decimal values Interest =  30.24 type(Interest) #answer is float Message = ...
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Python

Indexing--  it will help u to fetch single character  string= "Python" string[2] # slicing process of fetching a sub-string from the given string  #sequence of charater we can fetch means more than 1 character string="Divyanshu" string[2:4+1]   #basically here number is index value #string[start_index:end+index+1] string = "Hunny"   #indexing agr positive hai to left se count hoga #right se negative me string[:]  #it will give u entire string #now If i want to any characterwise index like string is Hunny and I want un only #string[start_index:end_index+1:step] string[1:4:2] #reverse your string #string[:: -1] string="Baba hunny" string[:: -1] # to convert into lowecase string="New Divyanshu" new_string=string.lower()  #new_string becase we've to create another string print(new_string) s1={1,2,3,4,5}    s2={3,2,8,67,85} s3=s1.union(s2) s3   #isme add hota hai whole value lekin common value update nhi hongi #intersection - ...
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SQL for Data analysis

 Create Database Test1;  Use Test1; ////////////////////// Use Test1; Create Table studentsData; Create table students(Roll_No INT(2) , Name Char(100) , Grade Char(1)); select * from students;
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Add CSS using external CSS

>>> U just need to create a another page and save it with the name style.css >>> and then go to link that style page with your html docs how to link your css with html page ? >>> You can find code below , it will help you to link your external page with your html docs <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Divyanshu Khare || MERN Developer</title> <meta description = "description" content="Divyanshu Khare's website"> <link rel="stylesheet" type="text/css" href="style.css">   <!----------link external css page ---------> </head> <body> </body> </html>
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Meta data in Website

 <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta description ="description" = content="Hey I'm creating this website for my own practice"> <title>Divyanshu khare || MERN Developer</title> </head> <body> <form> <div> <lable = "UserName">user Name</lable>  <!--------Lable is before any box ----> <input type="text" id="UserName" >  </div> <div> <lable = "passwordFor">Password</lable>  <input type = "password" id = "passwordFor" required      placeholder = "Enter your password"> </div> <div><input type = "submit"></div> <!-----------This is submit button-----------> </form...
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