Definition of

Parameter

Parameter
A value that is already "built in" to a function.

Example: in the function h(year) = 20 × year
"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's growth rate is 30 cm per year, so its function is 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)
 
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