Python

links

http://en.wikibooks.org/wiki/Non-Programmer%27s_Tutorial_for_Python_2.6
http://docs.python.org/tutorial

Reference

http://docs.python.org/ref/ref.html

basics

print "Hello, World!"

command called print followed by one argument,which is "Hello, World!". (referred to as a string of characters, or string) Command and its arguments are collectively referred to as a statement,

print "2 + 2 is", 2 + 2

The first argument is the string "2 + 2 is" and the second argument is the mathematical expression 2 + 2, which is commonly referred to as an expression. each of the arguments separated by a comma

sys.argv   arguments are passed to the script in the variable sys.argv
#          is used to start a comment

operations for numbers

Operation	Symbol	Example
Power (exponentiation)	**	5 ** 2 == 25
Multiplication	*	2 * 3 == 6
Division	/	14 / 3 == 4
Remainder (modulo)	%	14 % 3 == 2
Addition	+	1 + 2 == 3
Subtraction	-	4 - 3 == 1

userinput

raw_input

user_reply = raw_input("Who goes there? ")