colon-equal assignment operator; :=
In programming, the symbol := used for assignment, especially in languages like Pascal or Go.
In Pascal, you use the colon-equal for assignment.
definition symbol; :=
In mathematics, the symbol := used to denote a definition, e.g., 'let x := 5'.
In mathematical definitions, the colon-equal is often used.
Variant with interpunct; less common but seen in some technical writing.
From English 'colon' + 'equal', referring to the symbol :=.