java script

Which of the following expressions will yield $0\mathrm{.}5?$

$\frac{1}{2}$

$\frac{1\mathrm{.}0}{2}$

$($double$)(1/2)$

$($double$)\frac{1}{2}$

$\frac{1}{2\mathrm{.}0}$

$6$