var x, y = 3 # 3を変数`x`と変数`y`に代入
echo "x ", x # "x 3"を出力
echo "y ", y # "y 3"を出力
x = 42 # `y`を維持しつつ、`x`を42にする。
echo "x ", x # "x 42"を出力
echo "y ", y # "y 3"を出力
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