Chap. 2 eloquent javascript

Question 1

let ten = 10;
console.log(ten * ten);

Answer 1

// → 100

Question 2

let mood = "light";
console.log(mood);
// → light
mood = "dark";
console.log(mood);

Answer 2

// → dark

Question 3

let luigisDebt = 140;
luigisDebt = luigisDebt - 35;
console.log(luigisDebt);

Answer 3

// → 105

Question 4

let one = 1, two = 2;
console.log(one + two);

Answer 4

// → 3

Question 5

let by = 111;
console.log(8 * by);

Answer 5

888

Question 6

let by = 111;
console.log(8 + by);

Answer 6

119

Question 7

If you ask for the value of an empty binding, you’ll get the value ________

Answer 7

undefined

Question 8

A single let statement may define multiple bindings. The definitions must be separated by_________

Answer 8

commas

Question 9

Binding names can be any word. Digits can be part of binding names—catch22 is a valid name, for example—but the name must not start with a _______

Answer 9

digit

Question 10

A binding name may include ________ or_________ but no other punctuation or special characters.

Answer 10

dollar signs ($)
 underscores (_)

Question 11

What is this missing?

let x = 30;
console.log("the value of x is"  x);

Answer 11

comma before x

Question 12

console.log(Math.min(2, 4) + 100);

Answer 12

102

Question 13

The _______ function is a standard JavaScript function that returns true only if the argument it is given is NaN

Answer 13

Number.isNaN

Question 14

Write short hand:

counter = counter + 1;

Answer 14

counter += 1;

Question 15

Having the looping condition produce false is not the only way a loop can finish. There is a special statement called_________ that has the effect of immediately jumping out of the enclosing loop.

Answer 15

break

Question 16

You may put any number of____ labels inside the block opened by switch. The program will start executing at the label that corresponds to the value that switch was given, or at______ if no matching value is found.

Answer 16

case

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