Functions and Parameters

Front

Why do we write functions?

Back

Make our code easier to understand by giving a readable name to a group of instructions, Avoid writing repeated code, Make our code reusable.

Front

What is the parameter of the function in the following code: function printThreeTimes(word){ println(word); println(word); println(word); }

Back

word

Front

What is the output of the following program?
function start(){
var x = 5;
sumTo(x);
println(x);
}
function sumTo(num){
var sum = 0;
for(var i = 0; i <= num; i++){
sum += i;
}
println(sum);
}

Back

15
5

Front

What is printed by the following program?
function printNumbers(two, one, zero){
println(two);
println(one);
println(zero);
}
function start(){
var zero = 0;
var one = 1;
var two = 2;
printNumbers(zero, one, two);
}

Back

0
1
2

Front

How many parameters to INTO the function sum, and how many return values come out of the function sum? function sum(first, second, third){ var result = first + second + third; println(first); println(second); println(third); return result; }

Back

3 parameters go in, 1 return value comes out

Front

We want to write a function isSuperman that takes in two parameters isBird and isPlane and returns true if it in in fact Superman, and false otherwise. If it's not a bird and it's not a plane, it must be Superman. Which of the following functions is the correct implementation of isSuperman?

Back

function isSuperman(isBird, isPlane){
return !isBird && !isPlane;
}

Front

What are the names of the parameters in the following code:
function start(){
var length = 5;
var width = 4;
rectangleArea(length,width);
}
function rectangleArea(base, height){
var area - base * height;
println(area);
}

Back

base and height

Front

What is printed by the following program?
function product(x, y){
return x * y;
}
function difference(x, y){
return x - y;
}
function start(){
var x = 2;
var y = 5;
var value1 = product(x, y);
var value2 - difference(y, x);
var result = difference (value1, value2);
println(result);
}

Back

7

Front

What is the minimum number of parameters that must be given when calling the 'drawCircle' function? Options: Four, Three, Two, One

Back

Four

Front

What will be printed to the screen when the following program is run?
function start(){
println(doubleNumber(10));
}
function doubleNumber(x){
var doubledX = 2 * x;
return doubledX;
}

Back

40