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Output summary

>>>print (' Helllo World ') >>>print ("Hello World")

The output is same.

>>>print (>>>print) (3*5)

Print () If you lose a string of text, enclose it in quotation marks or ", if it is a number.

>>>a=[1,3]>>>print (2 in a) false

Python can output logical outcome.

Explain the idle problem, in command-line mode, you can only enter one line at a time, if you want to complete multiple lines of command input at the same time, you can create a new file, enter multiple commands, save, and then run. (seems to have something to do with the batch of documents?) I don't know, I'm a novice)

Data type

Python consists of four basic data types, integer, float, String, and Boolean (BOOL)

The bool type contains two values, True and false, to indicate that the logic is "non". Numbers include integers, long integers, floating-point numbers, complex numbers (6+8j).

>>>wu= ' abd ' < ' erh ' >>>wu>>>true

If statement

If condition statement: Execute statement

Note that the colon cannot be omitted, the inner statement must have a uniform indentation, typically four spaces, or a tab;python in place of other symbols, such as {}, but the entire file needs to be indented, either all spaces, or all tabs, generally recommended spaces

Quotes

About the quotation marks, puzzled for a long time, and now summarize;

Single and double quotes are basically no different, three quotes (three single quotes or three double quotes) are special, and with three quotes, you can indicate a multiline string. You can use single and double quotation marks freely in three quotation marks.

"This is a multi-line string. The first line. The second line. What ' s your name?, "I asked. He said "Bond, James bond."

Two ways to represent what ' s your name

' what\ ' Your name? ' " What ' s your name? "

Similarly, to use the double quotation mark itself in a double-quoted string , you can also help with the escape character. Alternatively, you can use the escape character \ \ to indicate the backslash itself .

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Python Learning notes Clutter a piece