How to use the QM code to achieve the following CMD code effect

[Kevin]

no to find part of a string there are numerous functions

1 example

Code:

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str s ss
s=
;hello world
;QM is very powerful

int i
for i 0 2000000000
,if(ss.getl(s -i)<0) break ;;no more
,if(ss.len=0) continue ;;skip empty
,if find(ss "hello" 0 1)
,,mes F"s Contains characters hello, It is in the ({i}) line"