The data type, if not defined explicitly, is determined based on the initial value given to the variable.Ī function within a program may contain multiple variables, each of which may be assigned different values based on the input parameters. Some programming languages require variables to be declared before they can be used, while others allow variables to be created on the fly. For example, a variable of the string data type may contain a value of " sample text" while a variable of the integer data type may contain a value of " 11". ![]() They are assigned both a data type as well as a value. ![]() Variables are also used in computer programming to store specific values within a program. The equation above may also be called a function since y is a function of x. For example, in the equation below, y is the "dependent variable" because its value is based on the value assigned to the "independent variable" x. In algebraic equations, the value of one variable is often dependent on the value of another. ![]() In mathematics, a variable is a symbol or letter, such as "x" or "y," that represents a value.
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