fprintf is showing NaN

i am tryng to create a prgram that gives a prognosis for a temperature reading in any units. the output always offers

The temperature of 36.667 degrees Celsius, results in a prognosis of NaN

why is my message reading NaN, and how can i fix it?

TEMP=input("Temperature in any Units");
UNITS=input("What are the Temperature Units? (Type only the number '1' for Celcius, '2' for farenheiht, or '3' for kelvin)");
if UNITS==1||2||3
    if UNITS==1
        T=TEMP;
        if T<35
            PG="Hypothermia";
        elseif T>=35&&T<36.111
            PG="Possibly Sick";
        elseif T>=36.111&&T<37.5
            PG="Normal";
        elseif T>=37.5&&T<38.333
            PG="Fever";
        elseif T>=38.333&&T<40
            PG="Severe Fever";
        elseif T>=40
            PG="Hyperplexia";
        end
    end
    if UNITS==2
        T=(TEMP-32)*(5/9);
        if T<35
            PG="Hypothermia";
        elseif T>=35&&T<36.111
            PG="Possibly Sick";
        elseif T>=36.111&&T<37.5
            PG="Normal";
        elseif T>=37.5&&T<38.333
            PG="Fever";
        elseif T>=38.333&&T<40
            PG="Severe Fever";
        elseif T>=40
            PG="Hyperplexia";
        end
    end
    if UNITS==3
        T=TEMP-273.15;
        if T<35
            PG="Hypothermia";
        elseif T>=35&&T<36.111
            PG="Possibly Sick";
        elseif T>=36.111&&T<37.5
            PG="Normal";
        elseif T>=37.5&&T<38.333
            PG="Fever";
        elseif T>=38.333&&T<40
            PG="Severe Fever";
        elseif T>=40
            PG="Hyperplexia";
        end
    end
    fprintf("The temperature of %.3f degrees Celsius, results in a prognosis of %.3f",T,PG)
end 

Answer 1

[Raghav Gnanasambandam]

You need to add '%s' for printing a string in fprintf. Here is the corrected code.

TEMP=input("Temperature in any Units");
UNITS=input("What are the Temperature Units? (Type only the number '1' for Celcius, '2' for farenheiht, or '3' for kelvin)");
if UNITS==1||2||3
    if UNITS==1
        T=TEMP;
        if T<35
            PG="Hypothermia";
        elseif T>=35&&T<36.111
            PG="Possibly Sick";
        elseif T>=36.111&&T<37.5
            PG="Normal";
        elseif T>=37.5&&T<38.333
            PG="Fever";
        elseif T>=38.333&&T<40
            PG="Severe Fever";
        elseif T>=40
            PG="Hyperplexia";
        end
    end
    if UNITS==2
        T=(TEMP-32)*(5/9);
        if T<35
            PG="Hypothermia";
        elseif T>=35&&T<36.111
            PG="Possibly Sick";
        elseif T>=36.111&&T<37.5
            PG="Normal";
        elseif T>=37.5&&T<38.333
            PG="Fever";
        elseif T>=38.333&&T<40
            PG="Severe Fever";
        elseif T>=40
            PG="Hyperplexia";
        end
    end
    if UNITS==3
        T=TEMP-273.15;
        if T<35
            PG="Hypothermia";
        elseif T>=35&&T<36.111
            PG="Possibly Sick";
        elseif T>=36.111&&T<37.5
            PG="Normal";
        elseif T>=37.5&&T<38.333
            PG="Fever";
        elseif T>=38.333&&T<40
            PG="Severe Fever";
        elseif T>=40
            PG="Hyperplexia";
        end
    end
    fprintf("The temperature of %.3f degrees Celsius, results in a prognosis of %s",T,PG)
end