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ceil, floor, rint, dceil, dfloor, drint

ceil(num)
dceil(num)
:: num より大きい最小の整数を求める.
floor(num)
dfloor(num)
:: num より小さい最大の整数を求める.
rint(num)
drint(num)
:: num を整数にまるめる.
return
整数
num
[0] dceil(1.1);
1


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