Passing Variables to Functions

Frequently you need to pass specific values to functions, and the functions will use those values when executing their code. You pass values to a function in comma-delimited form. A function definition needs a list of variable names in () that match the number being passed in. For example, the following function accepts two arguments, name and city, and uses them to build the output string:

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function greeting(name, city){
  console.log("Hello " + name);
  console.log(". How is the weather in " + city);
}

To call the greeting() function, you need to pass in a name value and a city value. The value can be a direct value or a previously defined variable. To illustrate this, the following code executes the greeting() function with a name variable and a direct string for city:

var name = "Brad";
greeting(name, "Florence");