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Can someone explain me why we used curly braces "{}" in this code?

Author Votes Δ
Zakaria Acharki 2 +0.39
adiga 2 +0.60
brk 1 -0.63
Sebastian Kaczmarek 1 -1.82
Sami Ahmed Siddiqui 1 -1.05
Last visited: Sep 4, 2019, 3:46:46 PM