upper case character testing

I want to use the isupper function to see if at least one character in the array is uppercase. I tried using the for loop, but the for loop will return false even if one character is not uppercase. Then i thought using the logical or, but the size of the array is not specific. the array can be anywhere from 8 to 16 characters. Any ideas?
show us what you did so far

but the for loop will return false even if one character is not uppercase
a loop returns nothing (I suspect you didn't break the loop)
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