String Indexing and Length
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Does word[0] access the first character of a string?
2. Does .length give the number of characters in a string?
3. Is () used instead of [] to access a character?
4. Does .length need parentheses after it, like .length()?
5. Is 'Length' with a capital L valid JavaScript syntax?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1word[0] | Alength | |
| 2word.length | Bname[1] | |
| 3Accesses the second character of a string | CWrong - use square brackets, not round brackets | |
| 4A property that never needs parentheses | DWrong - length is a property, not a method | |
| 5console.log(word(0)); | EAccesses the first character of the word string | |
| 6console.log(word.length()); | FGives the total number of characters in word |
C
Definitions
length
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
console.log(word_0]);
2.
console.log(word.______);
3.
let ch = word[_];
4.
let name = "Amy";
console.log(name.______);
5.
let size = name.______;
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
console.log(word(0));
B
let word = "cat";
C
console.log(word.length);
Question 2
A
let text = "dog";
B
console.log(text(1));
C
console.log(text.length);
Question 3
A
let text = "cat";
B
console.log(text.length);
C
console.log(text0]);
Question 4
A
let word = "sun";
B
console.log(word[0]);
C
console.log(word.length);
D
console.log(word[1);
Question 5
A
let name = "Amy";
B
console.log(name[0]);
C
console.log(name[1]);
D
console.log(name[2]);
E
console.log(name.lenght);
Answer Key
String Indexing and Length
Section A: Quick Questions
Q1
A — Yes
Q2
A — Yes
Q3
B — No
Q4
B — No
Q5
A — No
Section B: Match the Pairs
Q1
word[0] → Accesses the first character of the word string
Q2
word.length → Gives the total number of characters in word
Q3
Accesses the second character of a string → name[1]
Q4
A property that never needs parentheses → length
Q5
console.log(word(0)); → Wrong - use square brackets, not round brackets
Q6
console.log(word.length()); → Wrong - length is a property, not a method
Section C: Definitions
Q1
length — The number of characters in a string, accessed as a property without parentheses.Section D: Fill in the Blanks
Q1
console.log(word[0]);Q2
console.log(word.length);Q3
let ch = word[1];Q4
let name = "Amy";
console.log(name.length);Q5
let size = name.length;Section E: Spot the Error
Q1
A — Use square brackets [], not round brackets, to access a character.
Q2
B — Use square brackets [], not round brackets, to access a character.
Q3
C — Missing the opening square bracket before the index.
Q4
D — Missing the closing square bracket after the index.
Q5
E — 'length' is misspelled as 'lenght'.