Approach to coding, good/bad

[j.crater]

Hello all,
this question is about coding generally. But if the answer might contain someting Python-specific, do point it out.

I noticed that with coding, I tend to take the approach:

• write all the code for what the program should do, the way it feels most right/correct
  

• execute it and correct/modify it step by step, as the execution hits (numerous) errors
  

What do you as experienced coders think of that? It kind of works for me and brings success so far. But at the same time it feels like quite an immature strategy, which could just be my comfort zone. Does it need (minor) improvements? Should I change the approach completely? Is there a logical next step in the process of learning to code?
Thanks for comments!