Variables
– a label as an reference to an object – Contain a-z, A-Z, 0-9, _, case sensitive, not begin with digits, not keywords – Meaningful name, underscore style or camel case
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– a label as an reference to an object – Contain a-z, A-Z, 0-9, _, case sensitive, not begin with digits, not keywords – Meaningful name, underscore style or camel case