MATLAB: Need help with the function (Basic Question)

helpif statement

Hi, I need help with my function using if statements. When I try it with random pH its giving me incorect messages. Im not sure how to fix it. Heres what i have so far:
    message = "acidic";
    if 0<= pH, pH<7
    end   
    message = "neutral";
    if pH==7 
    end  
    message = "basic"; 
    if 7<pH, pH>=14
    end   
    message = "Not valid pH"; 
    if 0>pH, pH<14
   ph=0;     
end

Best Answer

Step1: I think it would be better to replace your commas with && like so:
if 0 <= pH && ph < 7
  % code
end
To make code function, we would then place the messages within the if statements like so:
if 0 <= pH && ph < 7
  message = 'acidic';
end
Lastly, it is better form to you if-elseif-else in this situation:
if 0<= pH && pH < 7
  message = "acidic";   
elseif pH == 7
  message = "neutral";
elseif pH > 7 && pH <= 14
  message = "basic";
else
  message = "Not valid pH";
  pH=0;
end
Hope this helps you understand.
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