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String  - It is a sequence of UNICODE character enclosed under a single, double, triple quotes is called as string There are following types of string operations- Repetition - It allows us to repeat the given string using repetition operators. It is denoted by *(asterisk). Concatenation -  It allows us to add the given string. It is denoted by (+). Membership - it has two members in and not in and return the value in false and true. The 'in ' operators takes two strings and return true if the first string appears as the substring in the second string. The 'not in' operators take two strings and return true if the first string doesn't appear as a substring in the second string and vice versa.  

  Conditional statement   - The if keyword is used to check a condition. If statement   - If the condition is true then the block of code inside the id statement is executed. Syntax of if statement -->.          if condition :         ____statement # INDENTATION - It is a white space character used at beginning of line. If-elif  - It is a keyword that allows to check multiple conditions. It comes after an if  & is used if the 'if' statement isn't executed or the condition is false. It can be of multiple times after if is made. Else  - It is a keyword which is executed of all the conditions of the id and elif conditions are false.  #* In this no conditions are required only statements are printed.   Loop  - These are used to execute a block of code repeatedly based on certain conditions.  These are of two types - 1. For loop. 2. While loop. 1-> wHILE-  loop executes a b...

  Comments - It is type of logical notes which are not a part of of a code. There are two types of comments -       Single line comment - It is started with a symbol (#).  Example -  # This is a comment. Multi- line comments -    It is started by s triple quotes ("'......"'). 2.  Uses of comments - It increases the readability of a code. Re- using existing code. Understanding code after long term use. 3.   Operators-  It is a particular symbol which is used to perform some operations with the help of operands. Operands  - A kind of data types used for calculations. It always exists with python operators.   🔥 Operators may be unary, Binary, Ternary. Operators with one operands is unary operator.  Example- ++a Operators with two operand is called binary operators. Example- a+b Operators with three operands is called ternary operators. Example a<b and a>b. 4.   Classification of operators:- a. Arithmetic ope...

Classification of organic compounds. (1). Acyclic or open chain compound :- These compounds contain open chain of carbon atoms in ther molecules. The carbon chains may be either stright chains or branched chains. They are also called aliphatic compounds . (2). Cyclic or close chain or ring structure :- These compounds contain chains or ring structure of atoms in their molecules. Alicyclic compounds:- These compounds contain a ring of three or more carbon atom in them. They resemble aliphatic compounds in many of their properties. AROMATIC COMPOUNDS:- These have a cyclic system containing at least one benzene ring. The parent member of the family is called benzene. Benzene has a homocyclic hexagonal ring of six carbon atoms with three double bonds in the alternate position. These compounds are also called benzonoid compounds and they exhibit special property known as aromaticity. Bicyclic and tricyclic compounds also belongs to this category. In addition to these there are some compound...

# Character sets-   These refers to the set of valid characters that python recognises for writing programs.  *Types of character sets->      Letters-   Includes uppercase(Capital alphabets), Lower case(Small alphabets).   EX- A,B,C...a,b....z. Digits-   Includes numeric values.   EX- 12,8,3,...9.0... Special characters-   Symbols used in programming.  EX- +,*,-,/,3,$,&,!. Escape sequence-    Represents special  characters. EX- \n( new line), \t(tab), (\\ backslash). WhiteSpace characters-   Used for space in coding. EX- (  ), newline().  # VARIABLES   ; In python it is used to store a Data values, Which can be accessed and processed out throughout the program. These are created by assigning value to a name by using (=) operator. EX- x=10. Variables in python are not usually declared with the data types . It automatically encounters the data type of a variable. Variables names...

Watermark Example !! WHAT IS PYTHON??   • Python is high level language.  • It is simple and easy compared to other languages.  • It was created by Guido van Rossum.  • It is free and open source.  • It is portable as the same program done in one OS , can be done in another OS easily.  #*#Invented by Guido van rossum in 1991 influenced Pythons flying circus. # KEY FEATURES OF PYTHON->  1. Platform independence: Python can run in any OS this is why it is portable.  2. Extensive libraries: Includes many libraries such as NumPy, Pandas, for analyzing data or for web development.  3. Ease of use: Simple and readable syntax allows beginners to learn quickly.  4. Wide applications: Used in fields such as Web development, Data Science, A.I and in game development.  # Python is widely adopted for its efficiency and community support, making it one of the most popular programming languages today.  ...

  मेघ आये सर्वेश्वर दयाल सक्शेना प्रस्तुत काव्यांश के माध्यम से कवि सर्वेश्वर दयाल सक्शेना ये कहना चाहते है की मेघ बहुत दिनों के बाद आया है पुरे तैयार होकर उसके स्वागत में उसके आगे आगे हवाए नाचती गति चल रही है और मेघ को देखने के लिए सभी लोग अपने घर के दरवाजे और खिडकिय खोलने लगे सभी गली और मुह्हलो के ऐसा प्रतीत होता है की जैसे कोई शहरी पाहून बड़े दिन बाद अपने शाशुराल को आये   है मेघ रूपी मेहमान बड़े बन थान के और स्वर के आये है | प्रस्तुत काव्यांश के माध्यम से कवि सर्वेश्वर दयाल सक्शेना ये कहना चाहते है की मेघ रूपी मेहमान को देखने के लिए पेड़ डालियों को हिला हिला के देखने लगे अंधी और धूल मेहमान को देखने के लिए अपनी घाघरा उठा के भागी भागी आई , महान को अत हुआ देख कर नदिया ठिठक उठी और और सास की तरह अपनी घूँघट सरकने लगी | प्रस्तुत काव्यांश के माध्यम से कवि सर्वेश्वर दयाल सक्शेना ये कहना चाहते है की मेघ रूपी मेहमान बूढ़े पीपल के पेड़ ने आगे भाद कर अभिवादन किया क्योकि मेघ रूपी मेहमान बरसो बाद उनकी हाल चाल जानने को ए थे और लता रूपी साली पेड़ रूपी किदर की ओट (पीछे) से बेचैनी से बोलती ...