bash简单的c风格的for循环：

#!/bin/bash
MAX=3
for ((i=1; i <= MAX ; i++)) ; do
	echo "$i"
done

bash for循环打印所有数组元素:

#!/bin/bash
ARRAY=( 'Debian Linux' 'Redhat Linux' 'Ubuntu Linux' )
ELEMENTS=${#ARRAY[@]}
for (( i=0;i<$ELEMENTS;i++)); do
    echo ${ARRAY[${i}]}
done