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instance method
Integer#ceil
int.ceil([ndigits]) → integer or float
numeric.c
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static VALUE
int_ceil(int argc, VALUE* argv, VALUE num)
{
int ndigits;
if (!rb_check_arity(argc, 0, 1)) return num;
ndigits = NUM2INT(argv[0]);
if (ndigits >= 0) {
return num;
}
return rb_int_ceil(num, ndigits);
}
Returns the smallest number greater than or equal to int with a precision of ndigits decimal digits (default: 0).
When the precision is negative, the returned value is an integer with at least ndigits.abs trailing zeros.
Returns self when ndigits is zero or positive.
Example
1.ceil #=> 1 1.ceil(2) #=> 1 18.ceil(-1) #=> 20 (-18).ceil(-1) #=> -10