23 lines
440 B
Markdown
23 lines
440 B
Markdown
importance: 5
|
|
|
|
---
|
|
|
|
# Create a calculator
|
|
|
|
Create an object `calculator` with three methods:
|
|
|
|
- `read()` prompts for two values and saves them as object properties with names `a` and `b` respectively.
|
|
- `sum()` returns the sum of saved values.
|
|
- `mul()` multiplies saved values and returns the result.
|
|
|
|
```js
|
|
let calculator = {
|
|
// ... your code ...
|
|
};
|
|
|
|
calculator.read();
|
|
alert( calculator.sum() );
|
|
alert( calculator.mul() );
|
|
```
|
|
|
|
[demo]
|