Question

what is a function ? how to use a function in a program ? ​

Answer 1

Explanation:

To use a function, you will have to call that function to perform the defined task. When a program calls a function, the program control is transferred to the called function.

Answer 2

Answer:

function, in mathematics, an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable). Functions are ubiquitous in mathematics and are essential for formulating physical relationships in the sciences