Declare a Hash, Get Data Back

• To declare a hash:

%hashname = ("key1", "value1", "key2", "value2", "key3", "value3");
example:
%studentData = ("Ben", "25", "Sarah", "36", "Phil", "40", "Spiff", "30");
• Just make sure you keep your keys and values aligned.
• To get a value back out,

$value = $hash{'key'};
• Now, to get Sarah's age, $age = $studentData{'Sarah'};
• Note: use $ on both the scalar and the hash, since we are actually dealing with a single variable.
• Use curly braces {}, not parens ()
• End with a semicolon.