Grade 9 Computer Science — Text inside a program

Work out how many characters a piece of text holds, which character sits at a given position, and what joining two pieces of text end to end gives.

Name: ________________________

1.Two pieces of text are joined end to end here and the result is printed. What does the program print?
```
first = "sun"
second = "rise"
print(first + second)
```
2.A character is read out of the joined text rather than out of either of the two pieces. What does this program print?
```
left = "top"
right = "most"
joined = left + right
print(joined[3])
```
3.The text is the same for all of these. Match each line to what it prints.
```
word = "network"
```
- print(word[0])
- print(word[3])
- print(word[6])
- print(len(word))
- print(word[len(word) - 2])
- k
- n
- 7
- w
- r
4.This program reads a single character out of a piece of text. What does it print?
```
word = "computer"
print(word[0])
```
5.How many characters does the text in this program hold?
```
word = "keyboard"
print(len(word))
```
6.Sort each of these words by how many characters it has.
Groups: Four characters · Six characters
- file
- folder
- loop
- binary
- byte
- switch
7.Two pieces of text are joined and the length of the result is printed. What does this program print?
```
a = "web"
b = "page"
print(len(a + b))
```
- a) 8
- b) 7
- c) 2
- d) 4
8.A loop can take a piece of text one character at a time, in the same way it takes a list one value at a time. What does this program print?
```
word = "data"
count = 0
for c in word:
    count = count + 1
print(count)
```

Answer key — Grade 9 Computer Science — Text inside a program

1. sunrise
2. m
3. print(word[0]) → n; print(word[3]) → w; print(word[6]) → k; print(len(word)) → 7; print(word[len(word) - 2]) → r
4. c
5. 8
6. file → Four characters; folder → Six characters; byte → Four characters; binary → Six characters; loop → Four characters; switch → Six characters
7. b) 7
8. 4