shell的for循环¶

类型一:

gitcontents=1 2 3
for gitcontent in $gitcontents
do
    echo $gitcontent
done

类型二:

for((i=1;i<10;i++))
do
    if((i%3==0)); then
        echo $i;
        continue;
    fi
done;

类型三(由于调用expr运行速度会慢很多,可以使用 i=$(($i+1))) 稍提速,不过有shell不支持:

i=1;
while(($i<100));do
  echo $i
  i=`expr $i+1`
done

类型四:

for i in {1..10}; do
echo $i
done

类型五:

arr=(1 2 3);
echo "arr is (${arr[@]})"
for i in ${arr[@]}
do
  echo $i
done

具体的实例¶

实例一:

folders=`ls`
for folder in $folders
do
    echo $folder
done