While Loops Python- No error why? -

why following code not throw error?

while 7:     print ("hi") 

instead, prints "hi" forever.

because expression 7 considered true in boolean context (like while test).

all non-zero numbers true in boolean context. non-empty strings, , non-empty lists, tuples or dictionaries.

basically, not empty, not none or false , not numerical 0 considered true value. see truth value testing.