That would be Python. I do not like it, which does not mean it is bad, it is a matter of taste

The alternative is you say "blocks are delimited by {}"

`if(foo) bar` should be invalid

`if(foo){bar}` is OK by me. Worik's tick of approval

(Neither is valid C I think)

Not necessarily. In practice, in C-as-actually-used people (should) set up linters and formatters, so that you can rely on indentation.

When programming, this means that you can behave as if both curly braces and indentation are significant, and you get an error when they are out-of-sync.