Python: Difference between revisions
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| Line 46: | Line 46: | ||
|} | |} | ||
=userinput= | =userinput= | ||
raw_input | raw_input (returns a string) | ||
user_reply = raw_input("Who goes there? ") | user_reply = raw_input("Who goes there? ") | ||
input | input (returns digits) | ||
number = input("Type in a number: ") | number = input("Type in a number: ") | ||
type(number) | type(number) | ||
print "number is a", type(number) | print "number is a", type(number) | ||
Revision as of 20:14, 6 October 2011
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 (returns a string)
user_reply = raw_input("Who goes there? ")
input (returns digits)
number = input("Type in a number: ")
type(number)
print "number is a", type(number)