[Haskell-beginners] Variable re-use

[Shishir Srivastava]

Hi,

Please can anyone explain how does 'a' get re-used in the code below. My
understanding so far of haskell is that variables are not allowed to mutate
or re-assigned.

---
do
a <- [1,2,3]
a <- [a+1]
return a

[2,3,4]
---

Thanks,
Shishir
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