7.4.1: Compound if, elseif Logic Examples

When we want to test if a variable is between 2 values, we can use compound if or elseif logic, as shown in the example below. 

 

Example \(\PageIndex{1}\) Compound if-elseif with 'and' logic

if (x<0) % 
    z = 100;
    beep

% The next elseif statement determines if x is between 0 and 10 with compound logic.

% Both (x>=0) and (x<10) have to be true.

elseif ((x>=0) & (x<10))
    z = 200; 
    beep

   pause(0.6) % wait 0.6 seconds between beeps)

   beep

else % For any other value of x, z is set to 0 and no beeps are made.

    z = 0;

end

z    % Show the value of z

Solution

Sample case 1: x = -5

Output: z = 100 with 1 beep

Sample case 2: x = 5

Output: z = 200 with 2 beeps

Sample case 2: x = 15

Output: z = 200 with no beeps.

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Example \(\PageIndex{2}\) BodyTemperature Compound if-else with 'or' logic

% Body Temperature version 1
% Normal body temperatures are between 36.1°C and 37.2°C
% https://medlineplus.gov/ency/article/001982.htm
% For this script, the user will input their body temperature:
body_temp = input('Enter your body temperature in degrees C: ')
if ((body_temp < 36.1) | (body_temp > 37.2))
   disp('Your body temperature is outside the normal range.')
   if (body_temp < 36.1) 
      disp('It is lower than normal.')
   else 
      disp('It is higher than normal.')
      disp('You may have an infection or illness.')
   end
else
      disp('Your body temperature is normal.')
end

Solution

Add example text here.

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