function sandwich(sandwichType) {

  console.log("I making a sandwich.");

  console.log("It is a " + sandwichType + " sandwich.");

}

​

// invoke, run, call function

sandwich("peanut butter and jelly");

sandwich("bologna");

​

function greet(greeting, name) {

  console.log(greeting + ", " + name);

}

​

greet("Hello", "Jerry");

greet("Hi", "Jenny");

​

var x;

var y;

function assign() {

  // var x = 0;

//   var y = 1;

  x = 0;

  y = 1;

}

​

function add() {

  console.log(x + y);

}

​

assign();

add();

​

function setup() {

  createCanvas(400, 400);

  background('blue');

  sandwich();

}