Question: how do i check all members in a list at the some time?

hi, suppose i have a list s:=[1,2,3,4,5,6,7,8,9] and i want to know if all the elements are great than zero so the outout "true" is expected in this case and for s2:=[1,-2,3,4,5] "false" is expected. any advice? thanks, CasperYC
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