What is the usage of for in linux

In Linux, the for command is used to create a loop that loops through a series of values ​​to use a command set in the series. The syntax is "for variable name in value list do command sequence done".

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

What is the usage of for in Linux

The for command is provided in the shell, which is used to create a loop that repeats through a series of values. Execute a defined set of commands using a value in the series repeatedly.

The basic format of the for statement is as follows:

for 变量名 in 值列表
do
命令序列
done

Provide a series of values ​​for iteration (the result of the previous output, this sentence is used for input) in the parameter list. There are several different ways to specify values ​​in a list.

Read values ​​in a list:

The most basic way to use the for command is to iterate by defining a column of values ​​in the for command. As shown below↓

#After execution, the values ​​assigned to t1 as shown in the figure are output one by one!

If you iterate the values ​​in the list, assign other values ​​to the variable and it can continue to be used. The iterated value is the last value.

The output results are as follows:

Related recommendations: "Linux Video Tutorial"

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