Ek is bang om in die donker te loop.

With bang meaning afraid, Afrikaans normally uses the pattern bang om ... te + verb when you mean afraid to do something.

So:

• Ek is bang om in die donker te loop = I am afraid to walk in the dark

Using bang te loop by itself would not be the normal standard structure here.

In this kind of Afrikaans infinitive construction, both are part of the pattern.

• om introduces the infinitive phrase
• te goes with the verb

So Afrikaans often expresses English to walk as om ... te loop, especially when other words come in between:

• om in die donker te loop

A useful way to think of it is:

• om starts the to ...
• te sits right before the verb

Because in an om ... te clause, the verb usually comes at the end.

So the structure is:

• om
  • other information + te
    • verb

Here:

• om
• in die donker
• te loop

That is why loop appears at the end, not right after om.

It means in the dark or in the darkness.

It is a very natural expression in Afrikaans. It usually refers to being somewhere with little or no light, not necessarily only at night.

So:

• in die donker loop = walk in the dark

Yes, that is a good way to think about it.

Normally donker means dark as an adjective, but in die donker it works like the dark or the darkness.

So:

• donker = dark
• die donker = the dark / the darkness

This is a common idiomatic expression, and you should learn in die donker as a set phrase.

They are used for different things:

• bang om ... te + verb = afraid to do something
• bang vir + noun/pronoun = afraid of someone or something

Examples:

• Ek is bang om in die donker te loop. = I am afraid to walk in the dark.
• Ek is bang vir honde. = I am afraid of dogs.

So in your sentence, the speaker is afraid of performing an action, which is why om ... te loop is used.

Yes, but it means something a little different.

• Ek is bang in die donker = I am afraid in the dark / I get scared in the dark
• Ek is bang om in die donker te loop = I am afraid to walk in the dark

The first sentence describes how you feel when you are in the dark.
The second specifically says what action you are afraid to do.

Here, loop most naturally means walk.

In other contexts, loop can sometimes feel a bit broader, depending on the situation, but its basic meaning is still walk or move on foot.

So in this sentence, the most natural understanding is:

• te loop = to walk

Yes. Ek is bang om in die donker te loop is the more natural and standard order.

In Afrikaans, words like place or time often come before te + verb in an infinitive clause:

• om in die donker te loop
• om môre te gaan
• om vinnig te hardloop

So learners should get used to this pattern:

• om
  • extra information + te
    • verb

You would say:

• Ek is nie bang om in die donker te loop nie.

Afrikaans usually uses double nie for negation:

• first nie after the finite verb or main statement part
• second nie at the end

So:

• Ek is → Ek is nie ... nie

It can match either afraid or scared in English, depending on context.

• afraid is often a good neutral translation
• scared can also fit in everyday speech

So in your sentence, both are fine in meaning:

• I am afraid to walk in the dark.
• I am scared to walk in the dark.

Usually bang is a very common, everyday word.