shell中for的使用

bogon:100APPLE jasonG$ help for

for: for NAME [in WORDS ... ;] do COMMANDS; done

    The `for' loop executes a sequence of commands for each member in a

    list of items.  If `in WORDS ...;' is not present, then `in "$@"' is

    assumed.  For each element in WORDS, NAME is set to that element, and

    the COMMANDS are executed.

for ((: for (( exp1; exp2; exp3 )); do COMMANDS; done

    Equivalent to

     (( EXP1 ))

     while (( EXP2 )); do

     COMMANDS

     (( EXP3 ))

     done

    EXP1, EXP2, and EXP3 are arithmetic expressions.  If any expression is

    omitted, it behaves as if it evaluates to 1.




其实语法很简单就是

 for i in `ls`; do 

   echo $i; 

 done