1. 100 CLS : KEY OFF : INPUT "Input temp. Celsius(C) Fahrenheit(F) Kelvin(k)";T$
102 IF T$ = "F" OR T$ = "f" THEN 105
103 IF T$ = "C" OR T$ = "c" THEN 115
104 IF T$ = "K" OR T$ = "k" THEN 125
105 INPUT "Input temperature F";F:
109 C = 5/9 * (F-32)
110 K = C + 273.15 : GOTO 200
115 INPUT "Input temperature C";C:
116 F = 9/5 * C +(32)
117 K = C + 273.15 : GOTO 200
125 INPUT "Input temp K.";K
130 C = K - 273.15
134 F = 9/5 * C +(32)
200 PRINT F;"F",C;"C",K"k." : END