Spaces and Blank Lines

Function_name ()

{

　　Commands #缩进 indentation is empty four spaces

}

Assignment = left and right cannot add space value=4

If plus space and [partition if [] while []

Empty Lines act as separate codes

Start and end of function, judgment or loop, function call, and the place where the connection is not close, add a space

If expression1

Then

Commands1

...

Else

Commands2

...

Fi

If expression1

Then

Commadns1

...

Elif expression2

Then

Commands2

...

Elif Expressionn

Then

Commandsn

...

Else

Commands (n+1)

...

Fi

While condition

Do

Commands

...

Done

For car in Value_list

Do

Comands

...

Done

for (init var; condition; change Var)

Do

Comands

...

Done

Spaces and Blank Lines