array in bash shell script code example

Example 1: bash array

# create an array - just assign first value
arrayname[0]='VALUE'

# define an array
declare -a arrayname=(element1 element2 element3)

# get array element at index 
${arrayname[2]}

# get all array elements
${arrayname[@]}

# get array length
${#arrayname[@]}

Example 2: bash list of integers

vals=($(seq 0 0.1 2.5))

Example 3: store command into array bash

#Just use following structure to store output of command into a variable:
var=$(command)
#For example:
var=$(echo 'hi')	#store hi into var
array=($(ls))	#store list of files into var

Example 4: bash script in array

if [[ " ${array[@]} " =~ " ${value} " ]]; then
    # whatever you want to do when array contains value
fi

if [[ ! " ${array[@]} " =~ " ${value} " ]]; then
    # whatever you want to do when array doesn't contain value
fi