shell的控制結構(break和continue語句) break 語句可以結束while,for,until或select等結構的執行,即從結構中跳出。退出迴圈後,轉到done語句後繼續執行。[root@sziit~]# vim breaks.sh (樣本)#!/bin/bash#filename:breaksecho "enter the number:"read Nfor i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15doif [ $i -eq $N ] ;thenecho "-------exit for loop-----"breakelseecho "------current is $i loop----"fidone[root@sziit ~]# ./breaks.sh (測試結果)enter the number:5------current is 1 loop----------current is 2 loop----------current is 3 loop----------current is 4 loop-----------exit for loop-----continue 語句用來跳過本次迴圈中的代碼,直接跳回到迴圈的開始位置。如果條件為真則開始下一次迴圈,否則退出迴圈。[root@sziit ~]# vim continues.sh (樣本)#!/bin/bash#filename:continuesecho "output the number:"read Necho "------------------"int=1for int in `seq 7`doif [ $N -gt 7 ] ;thenecho "please enter a number[1-7]"breakelif [ $N -le 0 ];thenecho "please enter a number[1-7]"breakelseif [ $int -eq $N ] ;thenecho "-"continuefifiecho "$int"done[root@sziit ~]# ./continues.sh (測試結果)output the number:4------------------123-567