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You want to determine whether an array or list contains a specific item.
To determine whether a list contains a specific item, use the -contains operator:
PS > "Hello","World" -contains "Hello" True PS > "Hello","World" -contains "There" False
Alternatively, use the -in operator, which acts like the -contains operator with its operands reversed:
PS > "Hello" -in "Hello","World" True PS > "There" -in "Hello","World" False
The -contains and -in operators are useful ways to quickly determine whether a list contains a specific element. To search a list for items that instead match a pattern, use the -match or -like operators.
For more information about the -contains, -in, -match, and -like operators, see “Comparison Operators”.
“Comparison Operators”