Summary of array operations and bubble sorting implementation script tutorial in shell

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Introduction to the shell array:

The code is as follows:

/ / Array variable definition:

$arr= (1 3 6 8 2 5 9 0 7 4)

/ / get the first element by default

$echo $arr

/ / accessed through the subscript, the second element of the array is taken below. The subscript of the shell array starts at 0.

$echo ${arr [1]}

/ / access the entire array

$echo ${arr [@]} or echo ${arr [*]}

/ / get the length of the array (maximum subscript)

$echo ${# arr [@]}

/ / get the length of a single element string

$echo ${# arr [3]}

/ / get part of the array content by slicing

$echo ${arr [@]: 1:2}

/ / start with the second element

$echo ${arr [@]: 2}

/ / to the second element

$echo ${arr [@]:: 2}

Shell implements bubble sorting:

The code is as follows:

#! / bin/sh

# sorting following array

Echo "please input a number list:"

Read-an arr

For ((iTuno; ii; jmurf -))

Do

# echo $j

If [[${arr [j]}-lt ${arr [j-1]}]]

Then

Tasking ${arr [j]}

Arr [j] = ${arr [j-1]}

ARR [j-1] = $t

Fi

Done

Done

Echo "after sorting:"

Echo ${arr [@]}

[tech@ebs sqlee] $. / sorting.sh

Please inout a number list:

0 2 9 6 8 5 7 4 3 1

After sorting:

0 1 2 3 4 5 6 7 8 9

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