What is the difference between andando and caminando?

Question

My understanding is that both mean 'to walk' - hence, when do you use one and not the other?

Answer 1

As a verb meaning "to walk", they are synonymous and interchangeable.

But there are certain idioms used for each that would normally use one or the other. For instance,

¿qué tal andas? -> how are you (doing)?

caminar derecho -> to act uprightly