couldn't find the babashka script output

Question

I'm learning babashka using the free ebook bobooka.pdf.

The first exercise in this book is running hello.clj.

When I run the first example in the cli with command bb hello.clj I don't see any output.

However if I run the expression in bb repl I see it print the result to the console.

The babashka version that I'm using is v1.3.176.

Any Idea why it is not printing the result to console in first case?