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General Discussion

methodology to design Algorithm

hi,

I am a beginner in coding and mobile app development, and my background is chemical engineering actually. so I am sorry if my question is not clear and confusing

I often stuck when trying to write code, I often not sure what i have to write first. I just write it and even though eventually the algorithm formed.

is there a method so i can write good structured algorithm before i implement it in code ?

what topic do i have to learn ? flowchart and pseudocode ?

i have tried to google, and I end up with 'algorithm and data structure' like stack, binary tree, linked list etc etc. do i have to learn these ? what topic that i have to learn first ?