for in ...循环中如何对每一步循环进行计数?

Osirix

for in ...循环中如何对每一步循环进行计数?

for i in var1 var2 var 3 ...
do
echo "This is the ?th variable: $i"
done

kingway

加一个变量用于计数啦。

counter=0
for i in var1 var2 var 3 ...
do
counter=$((counter + 1))
echo "This is the ${counter}th variable: $i"
done