Page 73 - ModularV1.1 _c8_flipbook
P. 73

String: This data type stores a sequence of characters including alphabets, numbers and
                    special symbols. A string value is defined inside single or double quotation marks. For example:
                    s1 = 'Py' or s2 = "thon"
                    List: The list data type can store series of values within square brackets.
                    For example: L = [23, 13.12, 2802, 'Orange',  "Education"]
                    Tuple: The tuple data type can store series of values within parentheses.
                    For example: T = (23, 23.07, 2112007, "Python")

                    Dictionary: A dictionary is a collection of key-value pairs of any type within { } brackets.
                    For example: dict = {1:'abc', 'x':4, 2:8}
                    None: This data type represents the absence of value. For example, num1 = None
                     OPERATORS

                 Operators are special symbols in Python that are used to perform arithmetic or logical computation.
                 They are used along with operands or values to get the desired result.
                 For example:    5 + 3    Operator


                               Operands
                 There are various types of operators, that are as follows:

                    Arithmetic operators                    Relational operators                  Logical operators
                 Let's discuss them in detail.
                 Arithmetic Operators

                 These operators are used to do basic mathematical calculations.

                   Operator                Name                 Syntax      Example (a = 11, b = 4)       Output
                       +        Addition                         a + b             >>> a + b                 15

                       –        Subtraction                      a – b             >>> a – b                  7
                       *        Multiplication                   a * b             >>> a * b                  44
                        /       Division                         a / b             >>> a / b                2.75

                       //       Floor or Integer Division       a // b            >>> a // b                  2
                       %        Remainder                       a % b              >>> a % b                  3
                       **       Exponentiation                  a ** b            >>> a ** b               14641

                 Let’s write a simple Python Program using arithmetic operators:

                 Step 1  Click on Start → All programs → Python
                         3.7 → IDLE(Python 3.7 32-bit)

                 Step 2  Click on File → New File.

                         Type  the  code  in the  editor  window  as
                         shown.


                                                                                       Writing a program


                                                                                            Introduction to Python  71
   68   69   70   71   72   73   74   75   76   77   78