The difference between Formal language and Well-formed formula

When used as nouns, formal language means a generally finite set of possible strings (called sentences) made of symbols (from a symbol set called the alphabet) along with rules constraining how the symbols can be used, whereas well-formed formula means a statement that is expressed in a valid, syntactically correct, manner.

check bellow for the other definitions of Formal language and Well-formed formula

  1. Formal language as a noun (computing theory):

    A generally finite set of possible strings (called sentences) made of symbols (from a symbol set called the alphabet) along with rules constraining how the symbols can be used.

  1. Well-formed formula as a noun (logic):

    A statement that is expressed in a valid, syntactically correct, manner.

    Examples:

    "This program works correctly on all well-formed formulas but it blows up on illegal input."

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