lesson 02 | course overview + the shell

Notes

foo=bar
echo $foo

foo = bar
echo $foo

the output of that will be zsh: command not found: foo

what happens in the above example is that we are effectively calling the "foo" program with the arguments: "=" and "bar"

you can use double or single quotes to print a value
```
echo "Hello"
```
```
echo 'Hello'
```
double quotes can interpolate variables
```
echo "Value is $foo"
```
will return: Value is bar
single quotes can NOT interpoloate variables
```
echo 'Value is $foo'
```
will return: Value is $foo