MATLAB: Trying to calculate tax due based on varying reported taxable incomes. All input values return the if statement condition ($0).

if statement

t=input('Enter total income: ');
% Calculate Tax due
if (0<t<=6000)
    due= 0
elseif (6000<t<=34000)
   due= 0.15*(t-6000)
elseif (34000<t<=80000)
    due= 4200+0.30*(t-34000)
elseif (80000<t<=180000)
    due= 18000+0.40*(t-80000)
elseif (180000<t)
    due= 58000+0.45*(t-180000)
else
    disp('invalid input')
end

Best Answer

80000<t<=180000 means ((80000<t)<=180000) . The first part, (80000<t) returns 0 (false) or 1 (true), and the second part compares that 0 or 1 to 180000, which is always satisfied.
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