python basis - basic grammar

python program block

• python program consists of code blocks;
• Block constituted by the statement;
• Statement consists of expressions, comments;
• Sequential statements include statements, conditional statements, loop statements, definition statement;
• Expression consists variables, operators, constants

 

 

Note

• Single-line comments begin with #
• Multi-line comments can have multiple  numbers #, there  '' 'and  "" " 

# This is a comment line 
print ( "hello world!")

"" " 
First-line comments 
second-line comments 
" "" 
Print ( "the Hello, Python!")

 

 

indentation

• used to represent indentation python code blocks, without using braces  {} 
• Indent number of spaces is variable, but with a block of statements must contain the same number of spaces indented
• General indentation is four spacebar