Asking for input

Python · Unit 1: First steps

input() reads what the person types.

It always gives back text (str), even if they type a number.

name = input()
print("Hello,", name)

Prints

Hello, Emma

To do calculations with what they type, convert the text: int(input()) for whole numbers and float(input()) for decimals.

age = int(input())
print(age + 1)

Prints

Exercises in this lesson

You do them in the app, which checks them on the spot and explains why.

1. Predict the output
If the person types Emma, what does it print?
```
name = input()
print("Hello, " + name + "!")
```
2. Multiple choice
What type is what input() gives back?
3. Predict the output
If the person types 5, what does it print?
```
number = input()
print(number * 2)
```
4. Put the lines in order
Order the lines to greet whoever types their name.
5. Multiple choice
What does int("8") do?
6. Complete the code
The person types 4. Fill in so it prints 12.
```
number = ___(input())
print(number * 3)
```
7. Put the lines in order
The person types 7. Order the lines to print its double.
8. Find the bug
This program should add 10 to the number they type. Which line has the error?
```
number = input()
print(number + 10)
```
9. Complete the code
The person types 1.5 (liters of water a day). Fill in to print how many liters that is in 2 days.
```
liters = ___(input())
print(liters * 2)
```
10. Predict the output
The person types 3 and then 4. What does it print?
```
a = input()
b = input()
print(a + b)
print(int(a) + int(b))
```

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