I'm trying to do a simple for loop in a UNIX script (bash).

Here's my script:

```
for i in {1..3}
do
   echo "Welcome $i times"
done

```

I was expecting this for output ...

```
Welcome 1 times
Welcome 2 times
Welcome 3 times

```

... but I get this ...

```
Welcome {1..3} times

```

What am I doing wrong?