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Math.ceil(x)
Any numeric value or expression.
The closest integer greater than or equal to x.
Math.ceil() computes the ceiling function--i.e., it returns the closest integer value that is greater than or equal to the function argument. Math.ceil() differs from Math.round() in that it always rounds up, rather than rounding up or down to the closest integer. Also note that Math.ceil() does not round negative numbers to larger negative numbers; it rounds them up towards zero.
a =index.html Math.ceil(1.99); // result is 2.0 b =index.html Math.ceil(1.01); // result is 2.0 c =index.html Math.ceil(1.0); // result is 1.0 d =index.html Math.ceil(-1.99); // result is -1.0
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