Strings – Indexing: name[0]
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. What index is the first character of a string?
2. What does 'Python'[0] return?
3. What does 'Python'[5] return?
4. What does 'hello'[-1] return?
5. What does 'cat'[3] do?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1word = 'cat' word[3] | AOk: Returns last char 'o' | |
| 2word = 'hello' word[1] = 'a' | BValid: Returns 'p' | |
| 3'python'[0] | COutput: P | |
| 4'hello'[-1] | DOutput: n | |
| 5w = 'Python' print(w[0]) | EError: Index 3 out of range | |
| 6w = 'Python' print(w[-1]) | FError: Strings are immutable |
C
Definitions
Index
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
name = 'Python'
print(name[_])
2.
word = 'hello'
print(word[__])
3.
name = 'Alice'
print(___('Alice'))
4.
text = 'code'
print(text[_])
5.
word = 'Python'
print(word[_])
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
name = 'hello'
B
first = name[0]
C
last = name[5]
D
print(first, last)
Question 2
A
name = 'hello'
B
first = name[1]
C
print('First letter:', first)
D
# expects: h
Question 3
A
name = 'hello'
B
print('Before:', name)
C
name[0] = 'H'
D
print('After:', name)
Question 4
A
name = 'hello'
B
index = '0'
C
first = name[index]
D
print('First:', first)
Question 5
A
name = 'hello'
B
first = name(0)
C
print('First letter:', first)
D
print('Done')
Answer Key
Strings – Indexing: name[0]
Section A: Quick Questions
Q1
A — 0
Q2
B — 'P'
Q3
A — 'n'
Q4
A — 'o'
Q5
B — IndexError
Section B: Match the Pairs
Q1
word = 'cat'
word[3] → Error: Index 3 out of range
Q2
word = 'hello'
word[1] = 'a' → Error: Strings are immutable
Q3
'python'[0] → Valid: Returns 'p'
Q4
'hello'[-1] → Ok: Returns last char 'o'
Q5
w = 'Python'
print(w[0]) → Output: P
Q6
w = 'Python'
print(w[-1]) → Output: n
Section C: Definitions
Q1
Index — The position number of a character in a string, starting at 0.~~string[0]Section D: Fill in the Blanks
Q1
name = 'Python'
print(name[0])Q2
word = 'hello'
print(word[-1])Q3
name = 'Alice'
print(len('Alice'))Q4
text = 'code'
print(text[2])Q5
word = 'Python'
print(word[5])Section E: Spot the Error
Q1
C — 'hello' has indices 0-4: index 5 is out of range
Q2
B — First character is at index 0, not 1
Q3
C — Strings are immutable: you can't change individual characters
Q4
C — Index must be an integer, not a string
Q5
B — Use square brackets [] for indexing, not parentheses ()