hakandilek/bash-arrays.md

## bash-arrays.md

      
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              bash-arrays.md
            
          
Syntax
Description


arr=()
Create an empty array


arr=(1 2 3)
Initialize array


${arr[2]}
Retrieve third element


${arr[@]}
Retrieve all elements


${!arr[@]}
Retrieve array indices


${#arr[@]}
Calculate array size


arr[0]=3
Overwrite 1st element


arr+=(4)
Append value(s)


str=$(ls)
Save ls output as a string


arr=( $(ls) )
Save ls output as an array of files


${arr[@]:s:n}
Retrieve n elements starting at index s
Syntax	Description
`arr=()`	Create an empty array
`arr=(1 2 3)`	Initialize array
`${arr[2]}`	Retrieve third element
`${arr[@]}`	Retrieve all elements
`${!arr[@]}`	Retrieve array indices
`${#arr[@]}`	Calculate array size
`arr[0]=3`	Overwrite 1st element
`arr+=(4)`	Append value(s)
`str=$(ls)`	Save ls output as a string
`arr=( $(ls) )`	Save ls output as an array of files
`${arr[@]:s:n}`	Retrieve n elements starting at index s