Defining and accessing arrays with the shell

Defining arrays

Arr= (1 2 3 4 5)

accessing arrays

# echo ${arr[0]}
1

Print all the values in an array

# echo ${arr[*]}

1 2 3) 4 5

Print array length

# echo ${#arr [*]}
5

The above defined array, the index can only be a number, the following will describe the associative array

Associative arrays

You first need to declare the variable as an associative array with a separate statement

# declare-a Arr_array

# arr_array= ([apple]= ' [orange]= ' 200 ')//define array index for Apple Orange

# echo ${arr_array[apple]}//array Specifies the value of the indexed array
100

Get an indexed list of arrays

# echo ${!arr_array[*]}
Orange Apple

Defining and accessing arrays with the shell