Float#to_i

to_i → integer

static VALUE
flo_to_i(VALUE num)
{
    double f = RFLOAT_VALUE(num);

    if (f > 0.0) f = floor(f);
    if (f < 0.0) f = ceil(f);

    return dbl2ival(f);
}

Returns self truncated to an Integer.

Example

1.2.to_i    # => 1
(-1.2).to_i # => -1

Note that the limited precision of floating-point arithmetic may lead to surprising results:

Example

(0.3 / 0.1).to_i  # => 2 (!)

See also #to_f #to_int #to_d #to_r also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0

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