method

ldexp

v1_8_7_72 - Show latest stable - 0 notes - Class: Math

1_8_6_287 (0)
1_8_7_72 (0)
1_8_7_330 (0)
1_9_1_378 (-38)
1_9_2_180 (0)
1_9_3_125 (0)
1_9_3_392 (0)
2_1_10 (0)
2_2_9 (0)
2_4_6 (0)
2_5_5 (0)
2_6_3 (0)
What's this?

ldexp(p1, p2) public

Returns the value of flt*(2**int).

   fraction, exponent = Math.frexp(1234)
   Math.ldexp(fraction, exponent)   #=> 1234.0

Show source

/*
 *  call-seq:
 *     Math.ldexp(flt, int) -> float
 *  
 *  Returns the value of <i>flt</i>*(2**<i>int</i>).
 *     
 *     fraction, exponent = Math.frexp(1234)
 *     Math.ldexp(fraction, exponent)   #=> 1234.0
 */

static VALUE
math_ldexp(obj, x, n)
    VALUE obj, x, n;
{
    Need_Float(x);
    return rb_float_new(ldexp(RFLOAT(x)->value, NUM2INT(n)));
}

ldexp

Related methods