mirror of https://github.com/01-edu/public.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
35 lines
964 B
35 lines
964 B
3 years ago
|
## Placeholders
|
||
|
|
|
||
|
|
Enough about numbers, let's check out what we can do with strings !
|
||
|
|
|
||
|
|
### Strings `` `${placeholders}` ``
|
||
|
|
|
||
|
|
The first one are `placeholders` for using values inside our strings, they have
|
||
|
|
there own syntax: `${}`.
|
||
|
|
|
||
|
|
#### Example
|
||
|
|
|
||
|
|
```js
|
||
|
|
console.log(`5 + 10 = ${5 + 10} = 15`) // -> 5 + 10 = 15 = 15
|
||
|
|
```
|
||
|
|
|
||
|
|
**Note that it only works using:** the `` ` `` backtick, not the `"` or `'`
|
||
|
|
quotes.
|
||
|
|
|
||
|
|
```js
|
||
|
|
// here, with the use of quotes instead of backticks, the placeholder is not evaluated and we see it as text:
|
||
|
|
console.log('5 + 10 = ${5 + 10} = 15') // -> 5 + 10 = ${5 + 10} = 15
|
||
|
|
```
|
||
|
|
|
||
|
|
### Instructions
|
||
|
|
|
||
|
|
We will provide a variable `name` and `age`. They will be pre-declared by us.
|
||
|
|
|
||
|
|
Declare a `presentation` variable of the string:
|
||
|
|
|
||
|
|
> `Hello, my name is` **name** `and I'm` **age** `years old`
|
||
|
|
|
||
|
|
But use placeholders to build the string you will put inside `presentation`.
|
||
|
|
Put the values of the provided variables `age` and `name` inside those
|
||
|
|
placeholders.
|