Calculate the ceiling of a number — the smallest integer greater than or equal to the given value. Useful in programming, discrete math, and real-world scenarios where rounding up is required.
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The ceiling function ⌈x⌉ returns the smallest integer that is greater than or equal to x. For example, ⌈2.3⌉ = 3 and ⌈-2.3⌉ = -2. For integers, ⌈n⌉ = n.
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