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PowerShell hashtables (also called associative arrays) let you associate keys with values. To define a hashtable, use the syntax:
$myHashtable=@{}
You can initialize a hashtable with its key/value pairs when you create it. PowerShell assumes that the keys are strings, but the values may be any data type.
$myHashtable=@{Key1="Value1";"Key 2"=1,2,3;3.14="Pi"}
To define a hashtable that retains its insertion order, use the [ordered] cast:
$orderedHash=[ordered]@{}$orderedHash["NewKey"]="Value"
To access or modify a specific element in an associative array, you can use either the array-access or property-access syntax:
$myHashtable["Key1"]
returns "Value1".
$myHashtable."Key 2"
returns the array 1,2,3.
$myHashtable["New Item"]=5
adds "New Item" to the hashtable.
$myHashtable."New Item"=5
also adds "New Item" to the hashtable.