## joker-num
### Instructions
In this exercise you are going to create a guessing game.
Create the script `joker-num.sh` which will receive the number to guess as argument. The number should be between 1 and 100 (inclusive). The player will then have 5 tries to guess the number.
To achieve this you will have to use a `for` loop.
When you're trying to guess the secret number with a valid input, your program must output some tips as follow:
- First you will need to prompt a message so that the player knows what he must do: `"Enter your guess (<tries_left> tries left)` .
- If the number is bigger than the secret one: `Go down` .
- If the number si smaller than the secret one: `Go up` .
- If the number is the correct one: `Congratulations, you found the number in <number_of_tries> moves!` .
- If you ran out of tries: `You lost, the number was <number>` .
### Usage
```console
$ ./joker-num.sh 55
Enter your guess (5 tries left):
50
Go up
Enter your guess (4 tries left):
75
Go down
Enter your guess (3 tries left):
55
Congratulations, you found the number in 3 moves!
$ ./joker-num.sh 70
Enter your guess (5 tries left):
70
Congratulations, you found the number in 1 moves!
$
```
### Error handling
- If the player enters the wrong number of arguments or the number is not between `1` and `100` , the program will print `Error: wrong argument` and exit with `1` .
- If the player is writing something that is not a valid number as an answer, the program will ask again to enter a new a guess and the number of tries won't be decremented.
Here an example for the last scenario:
```console
$ ./joker-num.sh 100
Enter your guess (5 tries left):
aaaa
Enter your guess (5 tries left):
# Here the player only press enter
Enter your guess (5 tries left):
10
Go up
Enter your guess (4 tries left):
20
Go up
Enter your guess (3 tries left):
10000
Enter your guess (3 tries left):
30
Go up
Enter your guess (2 tries left):
40
Go up
Enter your guess (1 tries left):
50
Go up
You lost, the number was 100
```
### Hints
- `read` : this command can be used to read input from the command line.
For example:
```console
$ read guess
```
After running that line, you would type your guess, press `Enter` , and it would be stored in the `$guess` variable for later use.
- `if [[ -z "$var" ]]` : could be helpful to check if a string is empty.
