按设定量增加bash循环

发布时间：2020-12-16 01:12:09 所属栏目：安全来源：网络整理

导读：我知道如何在bash中做一个每次增加1的循环,但是说我的范围是1到773,我想从循环中输出一个范围,这样我在每次迭代中得到两个变量.第一个将是1,第二个将是19.在第二次迭代中,第一个将是20,第二个是39. 我一直在玩类似的东西： for start in {1..773}do start=$(

我知道如何在bash中做一个每次增加1的循环,但是说我的范围是1到773,我想从循环中输出一个范围,这样我在每次迭代中得到两个变量.第一个将是1,第二个将是19.在第二次迭代中,第一个将是20,第二个是39.

我一直在玩类似的东西：

for start in {1..773}
do    
start=$(($start+20))
end=$(($start+20))
echo $start ## 
echo $end
done

期望的循环结果：

1. $start = 1 and $end = 19
 2. $start = 20 and $end = 39
 3. $start = 40 and $end = 59 
etc

但这不对.我想将这两个变量输出到一系列脚本以使R运行得更快,所以如果非bash(例如awk)解决方案更容易,那么如果简单的>那也很酷.将它发送给它.

谢谢！

如果要在773范围内打印范围,可以这样做

#!env bash
start=1
end=19
for counter in {1..773}
do
   echo $counter. "$start = " $start " and $end = " $end
   if [[ $start -eq 1 ]];
   then
      start=0
   fi
   start=$(($start+20))
   end=$(($end+20))
   if [[ $end -ge 773 ]];
   then
      break
   fi
done

产量

1. $start =  1  and $end =  19
2. $start =  20  and $end =  39
3. $start =  40  and $end =  59
4. $start =  60  and $end =  79
5. $start =  80  and $end =  99
6. $start =  100  and $end =  119
7. $start =  120  and $end =  139
8. $start =  140  and $end =  159
9. $start =  160  and $end =  179
10. $start =  180  and $end =  199
11. $start =  200  and $end =  219
12. $start =  220  and $end =  239
13. $start =  240  and $end =  259
14. $start =  260  and $end =  279
15. $start =  280  and $end =  299
16. $start =  300  and $end =  319
17. $start =  320  and $end =  339
18. $start =  340  and $end =  359
19. $start =  360  and $end =  379
20. $start =  380  and $end =  399
21. $start =  400  and $end =  419
22. $start =  420  and $end =  439
23. $start =  440  and $end =  459
24. $start =  460  and $end =  479
25. $start =  480  and $end =  499
26. $start =  500  and $end =  519
27. $start =  520  and $end =  539
28. $start =  540  and $end =  559
29. $start =  560  and $end =  579
30. $start =  580  and $end =  599
31. $start =  600  and $end =  619
32. $start =  620  and $end =  639
33. $start =  640  and $end =  659
34. $start =  660  and $end =  679
35. $start =  680  and $end =  699
36. $start =  700  and $end =  719
37. $start =  720  and $end =  739
38. $start =  740  and $end =  759

（编辑：李大同）

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