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  • note: you have inconsistent indentation in your code .... the first line and the last two lines should be indented 2 spaces .... they are on the same level as the while (true) { line .... the three lines of the if block should be indented 2 spaces less .......... incorrect indentation adds confusion to debugging Commented Aug 20, 2018 at 23:45
  • this is not about Arduino. it is C Commented Aug 21, 2018 at 4:43