batch-file - if else loop in a .bat script

Question

I figured out a way to write a if condition in .bat script :

if %sample==1(
echo "successful"
)

but how do I add else condition to it?

Answer 1

非常に単純に。

    if %sample==1(
    echo "successful"
    ) else (
    echo "unsuccessful"
    )

ちなみに、文字列を比較する場合は%、両側に（%sample%）が必要になります。

Answer 2

if %sample==1(
echo "successful"
) ELSE (
echo "failed"
)