---
id: practical-python-1.1
source_exercise_id: "1.1"
title: "Using Python as a Calculator"
section: "1.1 Python"
source_path: "01_Introduction/01_Python.md"
source_repo: "https://github.com/dabeaz-course/practical-python"
source_commit: "93dca856b41c61a0a0f85ae334116e4c125629ea"
student_visible_solution: false
has_private_solution: false
skip: false
---

# Exercise 1.1: Using Python as a Calculator

> Source: Practical Python Programming, `01_Introduction/01_Python.md`.

### Exercise 1.1: Using Python as a Calculator

On your machine, start Python and use it as a calculator to solve the
following problem.

Lucky Larry bought 75 shares of Google stock at a price of $235.14 per
share. Today, shares of Google are priced at $711.25. Using Python’s
interactive mode as a calculator, figure out how much profit Larry would
make if he sold all of his shares.

```python
>>> (711.25 - 235.14) * 75
35708.25
>>>
```

Pro-tip: Use the underscore (\_) variable to use the result of the last
calculation. For example, how much profit does Larry make after his evil
broker takes their 20% cut?

```python
>>> _ * 0.80
28566.600000000002
>>>
```

## 关联来源

- [[summaries/01_Python]]