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(add error handling) |
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=={{header|J}}== |
=={{header|J}}== |
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<lang J>select=: {::~ 'choose a number 0..' 0&".@prompt@, ': ',~ ":@<:@# [ i.@# smoutput@,&":&> ' '&,&.></lang> |
<lang J>(select=: {::~ 'choose a number 0..' 0&".@prompt@, ': ',~ ":@<:@# [ i.@# smoutput@,&":&> ' '&,&.>) :: (select@([ smoutput bind 'please choose a valid number'))</lang> |
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Example use: |
Example use: |
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