Value (mathematics)

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In mathematics, value may refer to several, strongly related notions:

  • The value of a variable or a constant is any number or other mathematical object assigned to it.
  • The value of a mathematical expression is the result of the computation described by this expression when the variables and constants in it are replaced by some numbers.
  • The value of a function is the number implied by the function as a result of a particular number being assigned to its argument (also called the variable of the function).[1][2]

For example, if the function f is defined by f(x) = 2x^2-3x+1, then, given the value 3 to the variable x yields the function value 10 (since indeed 2 · 32 – 3 · 3 + 1 = 10). This is denoted f(3)=10.

See also[edit]


  1. ^
  2. ^ Meschkowski, Herbert (1968). Introduction to Modern Mathematics. George G. Harrap & Co. Ltd. p. 32. ISBN 0245591095.