In this sentence
String output = letterh + three + one + one2 + zero + " " + letterw + zero + letterr + one + letterd + " " + (onepointnought+onedotnone) + " " + bool;
the letterh
contains 'H' whose ASCII value is 72 & the addition of three + one + one2 + zero
is 5 because these are non-string variables, so it is displaying (72 + 5)77
in the result,
you must convert three
, one
, one2
, zero
to sting variable