![MULTILINE STATEMENT
In Python, end of a statement is marked by a newline character. But we can make a
statement extend over multiple lines with the line continuation character ().
For example:
a = 1 + 2 + 3 +
4 + 5 + 6 +
7 + 8 + 9
This is explicit line continuation. In Python, line continuation is implied inside
parentheses ( ), brackets [ ] and braces { }. For instance, we can implement the above
multi-line statement as
a = (1 + 2 + 3 +
4 + 5 + 6 +
7 + 8 + 9)
Here, the surrounding parentheses ( ) do the line continuation implicitly. Same is the
case with [ ] and { }.
We could also put multiple statements in a single line using semicolons, as follows
a = 1; b = 2; c = 3
10/10/2021
MS.DEEPALI SHINKAR 17](https://image.slidesharecdn.com/introductiontopythonday2-211010060358/85/Basic-concepts-of-python-17-320.jpg)
Basic concepts of python
- 2. FIRST PROGRAM IN PYTHON 10/10/2021 MS.DEEPALI SHINKAR 2
- 3. PYTHON IDENTIFIER An identifier is a name given to entities like class, functions, variables, etc. It helps to differentiate one entity from another. Rules for writing identifiers: I. Identifiers can be a combination of letters in lowercase (a to z) or uppercase (A to Z) or digits (0 to 9) or an underscore _. Names like myClass, var_1 and print_this_to_screen, _hrs all are valid example. II. An identifier cannot start with a digit. 1 variable is invalid, but variable1 is perfectly fine. III. Keywords cannot be used as identifiers. 10/10/2021 MS.DEEPALI SHINKAR 3
- 4. KEYWORDS 10/10/2021 MS.DEEPALI SHINKAR 4 Every programming language has special reserved words, or keywords, that have specific meanings and restrictions around how they should be used. Python keywords are the fundamental building blocks of any Python program. Python keywords are different from Python’s built-in functions and types.
- 5. KEYWORDS 10/10/2021 MS.DEEPALI SHINKAR 5 Every programming language has special reserved words, or keywords, that have specific meanings and restrictions around how they should be used. Python keywords are the fundamental building blocks of any Python program. Python keywords are different from Python’s built-in functions and types.
- 6. GETTING THE LIST OF KEYWORDS IN THE PROMPT 10/10/2021 MS.DEEPALI SHINKAR 6
- 7. KEYWORDS Value Keywords: True, False, None. Operator Keywords: and, or, not, in, is. Import Keywords: import, from, as. 10/10/2021 MS.DEEPALI SHINKAR 7
- 8. OPERATOR KEYWORDS Operator keyword : and will result into True only if both the operands are True. 10/10/2021 MS.DEEPALI SHINKAR 8 A B A and B True True True True False False False True False False False False
- 9. OPERATOR KEYWORDS Operator keyword : or will result into True only if any operands are True. 10/10/2021 MS.DEEPALI SHINKAR 9 A B A and B True True True True False True False True True False False False
- 10. OPERATOR KEYWORDS Operator keyword : not operator is used to invert the truth value. 10/10/2021 MS.DEEPALI SHINKAR 10 A not A True False False True
- 11. IMPORT KEYWORD Import keyword :as is used to create an object while importing a module. It means giving a different name(user-defined) to a module while importing it. 10/10/2021 MS.DEEPALI SHINKAR 11
- 12. IMPORT KEYWORD Import keyword : from…… import is used to import specific attributes or functions into the current namespace. 10/10/2021 MS.DEEPALI SHINKAR 12
- 13. LINES AND INDENTATION 10/10/2021 MS.DEEPALI SHINKAR 13
- 14. COMMENTS Use of comments • Comments can be used to explain Python code. • Comments can be used to make the code more readable. • Comments can be used to prevent execution when testing code. 10/10/2021 MS.DEEPALI SHINKAR 14
- 15. COMMENT In Python, we use the hash (#) symbol to start writing a comment. It extends up to the newline character. These triple quotes(‘’’ ‘’’) are generally used for multi-line strings. But they can be used as multi-line comment as well. Example : """This is also a perfect example of multi-line comments""" 10/10/2021 MS.DEEPALI SHINKAR 15
- 16. STATEMENT Instructions that a Python interpreter can execute are called statements. For example, a = 1 is an assignment statement. 10/10/2021 MS.DEEPALI SHINKAR 16
- 17. MULTILINE STATEMENT In Python, end of a statement is marked by a newline character. But we can make a statement extend over multiple lines with the line continuation character (). For example: a = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 This is explicit line continuation. In Python, line continuation is implied inside parentheses ( ), brackets [ ] and braces { }. For instance, we can implement the above multi-line statement as a = (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9) Here, the surrounding parentheses ( ) do the line continuation implicitly. Same is the case with [ ] and { }. We could also put multiple statements in a single line using semicolons, as follows a = 1; b = 2; c = 3 10/10/2021 MS.DEEPALI SHINKAR 17
- 18. GETTING USER INPUT • While Python provides us with two inbuilt functions to read the input from the keyboard. input ( prompt ) raw_input ( prompt ) 10/10/2021 MS.DEEPALI SHINKAR 18
- 19. INPUT FUNCTION This function first takes the input from the user and then evaluates the expression, which means Python automatically identifies whether user entered a string or a number or list. If the input provided is not correct then either syntax error or exception is raised by python. 10/10/2021 MS.DEEPALI SHINKAR 19
- 20. WHAT ARE VARIABLES? A variable is created the moment you first assign a value to it. Variables are containers for storing data values. • Creating Python Variable : Python has no command for declaring a variable. 10/10/2021 MS.DEEPALI SHINKAR 20
- 21. PYTHON VARIABLES - ASSIGN MULTIPLE VALUES Many Values to Multiple Variables: Python allows you to assign values to multiple variables in one line. One Value to Multiple Variables: And you can assign the same value to multiple variables in one line. Unpack a Collection If you have a collection of values in a list, tuple etc. Python allows you extract the values into variables. This is called unpacking. 10/10/2021 MS.DEEPALI SHINKAR 21