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| -rw-r--r-- | basic_datatypes_and_operators/script.rst | 101 |
1 files changed, 54 insertions, 47 deletions
diff --git a/basic_datatypes_and_operators/script.rst b/basic_datatypes_and_operators/script.rst index 8554cf8..09f586b 100644 --- a/basic_datatypes_and_operators/script.rst +++ b/basic_datatypes_and_operators/script.rst @@ -27,8 +27,8 @@ team along with the logo of MHRD }}} .. R1 -Hello friends and welcome to the tutorial on 'Basic Data types and operators' -in Python. +Hello friends and welcome to the tutorial on +'Basic Data types and operators' in Python. .. L2 @@ -101,9 +101,9 @@ If we now see .. R8 -This means that 'a' is a type of int. There are lot of functions associated -with the int datatype, to manipulate it in different ways. These can be -explored by doing, +This means that 'a' is a type of int. There are lot of functions +associated with the int datatype, to manipulate it in different ways. +These can be explored by doing, .. L8 :: @@ -112,7 +112,8 @@ explored by doing, .. R9 -*int* datatype can hold integers of any size lets see this by an example. +*int* datatype can hold integers of any size lets see this by an +example. .. L9 :: @@ -122,9 +123,9 @@ explored by doing, .. R10 -As you can see, even when we put a value of 9 repeated 20 times, python did -not complain. This is because python's int data-type can hold integers of any -size. +As you can see, even when we put a value of 9 repeated 20 times, +python did not complain. This is because python's int data-type can +hold integers of any size. Let us now look at the float data-type. Decimal numbers in python are represented by the float data-type @@ -137,10 +138,10 @@ Decimal numbers in python are represented by the float data-type .. R11 -If you notice the value of output of ``p`` isn't exactly equal to ``p``. -This is because computer saves floating point values in a specific format. -There is always an approximation. This is why we should never rely on -equality of floating point numbers in a program. +If you notice the value of output of ``p`` isn't exactly equal +to ``p``.This is because computer saves floating point values in a +specific format. There is always an approximation. This is why we +should never rely on equality of floating point numbers in a program. The last data type in the list is complex number @@ -152,8 +153,9 @@ The last data type in the list is complex number .. R12 it's just a combination of two floats the -imaginary part being defined by j notation instead of i. Complex numbers -have a lot of functions specific to them. Let us look at these +imaginary part being defined by j notation instead of i. Complex +numbers have a lot of functions specific to them. Let us look at +some of these functions. .. L12 :: @@ -369,9 +371,9 @@ and two stars for a exponent. .. R33 -In case one wishes to use the current value of variable in which the result -is stored in the expression, one can do that by putting the operator before -`equal to`. +In case one wishes to use the current value of variable in which the +result is stored in the expression, one can do that by putting the +operator before `equal to`. .. L33 :: @@ -454,7 +456,8 @@ Let us try both these operations. .. R42 -As you can see,the first operation gives an integer,whereas the second one gives a float. +As you can see,the first operation gives an integer,whereas the second +one gives a float. Hence,though both mean the same,they give different outputs. Let us now discuss sequence data types in Python. Sequence data types @@ -475,8 +478,8 @@ The sequence datatypes in Python are * string * tuple -The list type is a container that holds a number of other objects, in the -given order. +The list type is a container that holds a number of other objects, in +the given order. .. R44 @@ -563,9 +566,9 @@ They can be accessed using index numbers .. R50 -Indexing starts from 0, from left to right and from -1 when accessing lists -in reverse. Thus num_list[2] refers to the third element 3. and greetings -[-2] is the second element from the end , that is 'l'. +Indexing starts from 0, from left to right and from -1 when accessing +lists in reverse. Thus num_list[2] refers to the third element 3. and +greetings [-2] is the second element from the end , that is 'l'. Addition gives a new sequence containing both sequences @@ -649,8 +652,8 @@ For this we can do .. R57 The syntax for slicing is, sequence variable name, square bracket, first -element index, colon, second element index. The last element however is not -included in the resultant list +element index, colon, second element index. The last element however is +not included in the resultant list .. L57 :: @@ -684,13 +687,13 @@ Let us see an example .. R60 -The, colon two, added in the end signifies all the alternate elements. This -is why we call this concept striding because we move through the list with -a particular stride or step. The step in this example being 2. +The, colon two, added in the end signifies all the alternate elements. +This is why we call this concept striding because we move through the +list with a particular stride or step. The step in this example being 2. We have talked about many similar features of lists, strings and tuples. -But there are many important features in lists that differ from strings and -tuples. Lets see this by example. +But there are many important features in lists that differ from strings +and tuples. Lets see this by example. .. L60 :: @@ -700,8 +703,8 @@ tuples. Lets see this by example. .. R61 -As you can see while the first command executes with out a problem there is -an error on the second one. +As you can see while the first command executes with out a problem there +is an error on the second one. Now lets try @@ -716,9 +719,9 @@ Its the same error. This is because strings and tuples share the property of being immutable. We cannot change the value at a particular index just by assigning a new value at that position. -We have looked at different types but we need to convert one data type into -another. Well lets one by one go through methods by which we can convert -one data type to other +We have looked at different types but we need to convert one data type +into another. Well lets one by one go through methods by which we can +convert one data type to other .. L62 :: @@ -729,8 +732,8 @@ one data type to other .. R63 -Python has built in functions int, float and complex to convert one number -type data structure to another. +Python has built in functions int, float and complex to convert one +number type data structure to another. .. L63 :: @@ -741,8 +744,8 @@ type data structure to another. .. R64 -As you can see the decimal part of the number is simply stripped to get the -integer. +As you can see the decimal part of the number is simply stripped to get +the integer. .. L64 :: @@ -753,8 +756,8 @@ integer. .. R65 -In case of complex number to floating point only the real value of complex -number is taken. +In case of complex number to floating point only the real value of +complex number is taken. Similarly we can convert list to tuple and tuple to list @@ -781,8 +784,8 @@ interesting problem. Let's say we have a string .. R67 -This produces a list with the string split at whitespace. Similarly we can -split on some other character. +This produces a list with the string split at whitespace. Similarly we +can split on some other character. .. L67 :: @@ -899,7 +902,8 @@ learnt to, #. Know the boolean datatype and operators -- +, *, /, **, % . #. use the sequence data types -- List,String and Tuple. #. Slice sequences by using the row and column numbers. -#. Split and join a list using ``split()`` and ``join()`` function respectively. +#. Split and join a list using ``split()`` and ``join()`` function + respectively. #. Convert to string to tuple and vice-versa. .. L79 @@ -925,9 +929,11 @@ Here are some self assessment questions for you to solve And the answers, -1. The major diffence between tuples and lists is that Tuples are immutable while lists are not. +1. The major diffence between tuples and lists is that Tuples are + immutable while lists are not. -2. To split the string on whitespace, we use the function `` split`` without any argument +2. To split the string on whitespace, we use the function `` split`` + without any argument :: string.split() @@ -940,3 +946,4 @@ And the answers, Hope you have enjoyed this tutorial and found it useful. Thank You. + |