author | Puneeth Chaganti <punchagan@gmail.com> |
Wed, 21 Apr 2010 14:43:08 +0530 | |
changeset 95 | fddcfd83e4f0 |
parent 94 | data-types.org@57ae1f75b7e0 |
child 98 | 8e02b76cf068 |
permissions | -rw-r--r-- |
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* Data Types |
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*** Outline |
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***** Introduction |
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******* What are we going to do? |
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******* How are we going to do? |
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******* Arsenal Required |
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********* None |
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*** Script |
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Welcome friends. |
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In this tutorial we shall look at data types available in Python and |
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how to perform simple Input and Output operations. |
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Puneeth Chaganti <punchagan@gmail.com>
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for 'Numbers' we have: int, float, complex datatypes |
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for Text content we have strings. |
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Puneeth Chaganti <punchagan@gmail.com>
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For conditional statements, 'Booleans'. |
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Puneeth Chaganti <punchagan@gmail.com>
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92
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Lets get started by opening IPython interpreter. |
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Puneeth Chaganti <punchagan@gmail.com>
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92
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Lets start with 'numbers' |
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Puneeth Chaganti <punchagan@gmail.com>
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All integers irrespective of how big they are, are of 'int' |
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data type |
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Puneeth Chaganti <punchagan@gmail.com>
parents:
92
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Now we will create a variable, say |
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Puneeth Chaganti <punchagan@gmail.com>
parents:
92
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x = 13 |
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Puneeth Chaganti <punchagan@gmail.com>
parents:
92
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print x |
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To check the data type of any variable Python provides 'type' function |
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Puneeth Chaganti <punchagan@gmail.com>
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92
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type(x) |
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Puneeth Chaganti <punchagan@gmail.com>
parents:
92
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y = 999999999999 |
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Puneeth Chaganti <punchagan@gmail.com>
parents:
92
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print y |
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Floating point numbers comes under 'float' |
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p = 3.141592 |
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type(p) |
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Puneeth Chaganti <punchagan@gmail.com>
parents:
92
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Python by default provides support for complex numbers. |
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c = 3+4j |
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c is a complex number. 'j' is used to specify the imaginary part. |
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type(c) |
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Python also provides basic functions for their manipulations like |
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abs(c) will return the absolute value of c(sqrt(a^2 + b^2)) |
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Puneeth Chaganti <punchagan@gmail.com>
parents:
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c.imag returns imaginary part and c.real gives the real part. |
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Puneeth Chaganti <punchagan@gmail.com>
parents:
92
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changeset
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Next we will look at Boolean datatype: |
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Its a primitive datatype having one of two values: True or False. |
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t = True |
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print t |
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Python is case sensitive language, so True with 'T' is boolean type but |
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true with 't' would be a variable. |
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f = not True |
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we can do binary operation like 'or' and 'not' with these variables |
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f or t |
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f and t |
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in case of multiple binary operations to make sure of precedence use |
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'brackets ()' |
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a = False |
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b = True |
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c = True |
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(a and b) or c |
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True |
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first a and b is evaluated and then the 'or' statement |
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a and (b or c) |
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False |
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Puneeth Chaganti <punchagan@gmail.com>
parents:
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changeset
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we come to the end of this tutorial on introduction of Data types in |
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Python. In this tutorial we have learnt what are supported data types, |
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supported operations and performing simple IO operations in Python. |
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*** Notes |