Array of shell programming uses

Record the use of arrays in the shell

The main is the creation of elements, elements of the increment, delete, change operation.

1#!/bin/Bash2 3 #基本数组操作4A= (1 2 3) # # () denotes an empty array5 Echo "a No. 0 element:"${a[0]}6 Echo "all elements:"${a[@]}7 Echo "Array Length:"${#a [@]}8 Echo "----------------------------------------------"9 Ten #遍历数组 One Echo "To iterate over an array:" A  forIteminch${a[@]} -  Do -     Echo$item the  Done - Echo "----------------------------------------------" -  - # #元素操作 +A= (${a[@]}4) - Echo "after appending 1 elements to the end:"${a[@]} +a[1]=5 A Echo "after modifying a 1th element:"${a[@]} atUnset a[1] - Echo "after removing the 1th element:"${a[@]} - unset a - Echo "after deleting all elements:"${a[@]} - Echo "----------------------------------------------"

Execution Result:

No. 0 Element: 1
All elements: 1 2 3
Array Length: 3
----------------------------------------------
To iterate over an array:
1
2
3
----------------------------------------------
After appending 1 elements to the end: 1 2 3 4
After modifying the 1th element: 1 5 3 4
After removing the 1th element: 1 3 4
After deleting all elements:
----------------------------------------------

Array of shell programming uses