myfirst.sh is the file and the code I have is -

```
#! /bin/bash

number = 1

while [ $number -lt 10 ]
do
    echo "$number"
    number=$(( number+1 ))
done

```

when I run this I get the following error

```
./myfirst.sh: line 3: number: command not found
./myfirst.sh: line 5: [: -lt: unary operator expected

```