[Python] Can't make my "while" cycle remember variables [closed]

Looked through many answers to my problem, but nothing works.

The problematic part of the code looks like this:

var1=1
var=0.5
i=0
while i<20:
var1=var+5
var=var1
i+=1
print("TEST var", var, "iteration", i)
print("TEST var1", var1)


It finishes 1st cycle and just wipes memory clean and both "var1" and "var" become "nun" and further calculations break. Like so:

TEST var 5.5 iteration 0
TEST var1 5.5
TEST var nan iteration 1
TEST var1 nan
TEST var nan iteration 2
TEST var1 nan
TEST var nan iteration 3
TEST var1 nan
...


I tried making it a list, but it still forgets.

I have experience coding, but still find dumb ways to get stuck on simple tasks... Need help

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