Parameter | |
 A value that is already "built in" to a function. Example: if a function that works out the height of a tree is h(year) = 20 × year, then "year" is a variable and "20" is a parameter. Parameters can be changed so that the function can be used for other things. Example: A different tree might have a growth rate of 30 cm per year, and its function would be h(year) = 30 × year We could even make it more general by writing h(age; rate) = rate × age and in this case a semicolon (;) is used to separate the variable(s) from the parameters(s) See: Variable | |