Shell read read console input, use of read

1.read Read console input

1.1 Basic grammar

read ( Options ) ( Parameters )
① Options ：

• -p： Specify the prompt when reading the value ;
• -t： Specifies the time to wait while reading the value （ second ） If -t Not adding means waiting

② Parameters

• Variable ： Specifies the variable name of the read value

1.2read Use

If the set time is exceeded , Then skip directly