Shell programming------Looping Statements

1. For Loop statement:Two common ways to use for: notation (1):

 for inch 1 2 3 4 5      (PS in $ (seq15 in {1). 5 })   do        echo"$val   "    Done

Notation (2):

　　 for ((i=0;i<; i++))            (  PS: Must Be for (())  )   {         "val=i%2"         if  0then             echo'${i} is a oddnumber'         fi   }

2. While loop statement:While common notation: notation (1):

 while read lines            # (  PS: While reads are read by line, often used for text read by rows    )do        if " $line " 5  then              Echo " 5 " Break fi do#               (PS done               < data.txt redirect  data read by rows from Data.txt)

Notation (2):

res=0  ]  do      echo"$res       "res-=1" done echo        "done"  

Shell programming------Looping Statements