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First Python Program

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Hi Readers! Let us execute programs in different modes of programming. Interactive Mode Programming Invoking the interpreter without passing a script file as a parameter brings up the following prompt − $ python Python 2.4 . 3 (# 1 , Nov 11 2010 , 13 : 34 : 43 ) [ GCC 4.1 . 2 20080704 ( Red Hat 4.1 . 2 - 48 )] on linux2 Type "help" , "copyright" , "credits" or "license" for more information . >>> Type the following text at the Python prompt and press the Enter − >>> print "Hello, Python!" If you are running new version of Python, then you would need to use print statement with parenthesis as in  print ("Hello, Python!"); . However in Python version 2.4.3, this produces the following result − Hello, Python!
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Python Comparison Operators

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These operators compare the values on either sides of them and decide the relation among them. They are also called Relational operators. Assume variable a holds 10 and variable b holds 20, then − [  Show Example  ] Operator Description Example == If the values of two operands are equal, then the condition becomes true. (a == b) is not true. != If values of two operands are not equal, then condition becomes true. (a != b) is true. <> If values of two operands are not equal, then condition becomes true. (a <> b) is true. This is similar to != operator. > If the value of left operand is greater than the value of right operand, then condition becomes true. (a > b) is not true. < If the value of left operand is less than the value of right operand, then condition becomes true. (a < b) is true. >= If the value of left operand is greater than or equal to the value of right operand, then condition becomes true. (a >= b) is not true. <= ...
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Python - Loops

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Decision making is anticipation of conditions occurring while execution of the program and specifying actions taken according to the conditions. Decision structures evaluate multiple expressions which produce TRUE or FALSE as outcome. You need to determine which action to take and which statements to execute if outcome is TRUE or FALSE otherwise. Following is the general form of a typical decision making structure found in most of the programming languages − Python programming language assumes any  non-zero  and  non-null  values as TRUE, and if it is either  zero  or  null , then it is assumed as FALSE value. Python programming language provides following types of decision making statements. Click the following links to check their detail.
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