Concatenating text strings

Question 1

var num = "2" + "2";
What is the value of num? Include quotation marks.

Answer 1

“22”

Question 2

What is it called when you combine two or more strings, using the plus sign?

Answer 2

concatenation

Question 3

message = (“Hello,” + “Dolly”);

What is the value of message? (Include the quotation marks.)

Answer 3

“Hello,Dolly”

Question 4

alert(“33” + 3);

What message displays in the alert box?

Answer 4

333

Question 5

Write a statement that assigns to scribe the concatenation of the first and last names of England’s greatest playwright. The variable hasn’t been declared beforehand.

Answer 5

var scribe = “William “ + “Shakespeare”;

Question 6

Write an alert that displays the concatenation of the two parts of “Woo hoo”

Answer 6

alert(“Woo “ + “hoo”);

Question 7

Write a statement that assigns to a variable the concatenation of the two parts of “Oh yeah” (no period at the end). The second part is “yeah” The variable hasn’t been declared beforehand.

Answer 7

var expression = “Oh “ + “yeah”;

Question 8

Write a statement that concatenates two variables and assigns the result to a third variable. The third variable hasn’t been declared beforehand.

Answer 8

var combo = firstPart + secondPart;

Question 9

Write a statement that displays an alert. The message is a string concatenated with a variable.

Answer 9

alert(“Hi, “ + userName);

Question 10

Write a statement that assigns to a variable the concatenation of a string with a number. The variable has been declared beforehand.

Answer 10

cost = “The cost: “ + 59.80;

Question 11

Assign strings to two variables. Then concatenate them and assign the result to a third variable. None of the variables have been declared beforehand.

Answer 11

var firstPart = "Hello, ";
var secondPart = "Dolly!";
var show = firstPart + secondPart;