shell 之while两种写法

1.while[]

#!/bin/dash 

min=
max=
while [ $min -le $max ]
do
    echo $min
    min=`expr $min + `
done  

2. while(())

#!/bin/dash
i=
while(($i<));do
echo "while(()): $i"
i=`expr $i + `
done

while(())