Keep getting error message "Index exceeds array bounds."

I've looked over my code, and my teacher has looked over my code, but nobody cam figure out what's wrong. Here's my code:

   % USER INPUT STATEMENTS
gender = menu('What is your gender?', 'Male', 'Female');
age = input('What is your age?');
weight = input('What is your weight in pounds?');
   % This sections finds out essential information to compute the heart rate
   % SENSOR INPUT STATEMENTS
hrate = dec2bin(88)
str = string(hrate);
   % This section converts the sensor readig of the heart rate to a string
   % DETERMINE AND DISPLAY CURRENT HEART RATE
chr = bin2dec(hrate);
disp(chr);
   % This section displays the current heart rate in decimal
   % COMPUTE MAXIMUM HEART RATE
if gender==1
    MHR = (205.8-0.685*(age));
else
    MHR = (206-0.88*(age));
end
   % This section computes the maximum heart rate.
   % CONDITIONAL STATEMENTS AND OUTPUT DISPLAY STATEMENTS 
if chr < .6*MHR
    disp('Below Level');
elseif .6*MHR <= chr < .7*MHR
    disp('Weight Loss');
elseif .7*MHR <= chr < .8*MHR
    disp('Cardio');
elseif .8*MHR <= chr < .9*MHR
    disp(Anaerobic (Hardcore));
else
    f= msgbox('lmao what you doin still alive you should be dead', 'lmao m8');
end

[madhan ravi]

Which line shows error?

[Ethan Hawley]

    Which line shows error?

Line 29

Answer 1

[madhan ravi]

>> COMMUNITY
What is your age?50
What is your weight in pounds?100

hrate =

      '1011000'

      88

Below Level
>>

[madhan ravi]

didn't get any error running your code