switch case not recognizing input

Code:user_input=input('Enter the mineral name: ')

switch user_input

case magnetite

fprintf('Mineral:Magnetite \n Formula:Fe3O4 \n Percent Iron:72.4 \n Melting Point (Celcius):1597')

case Magnetite

fprintf('Mineral:Magnetite \n Formula:Fe3O4 \n Percent Iron:72.4 \n Melting Point (Celcius):1597')

case hematite

fprintf('Mineral:Hematite \n Formula:Fe2O3 \n Percent Iron:69.9 \n Melting Point (Celcius):1565')

case Hematite

fprintf('Mineral:Hematite \n Formula:Fe2O3 \n Percent Iron:69.9 \n Melting Point (Celcius):1565')

case Goethite

fprintf('Mineral:Goethite \n Formula:FeO(OH) \n Percent Iron:62.9 \n Melting Point (Celcius):350')

case goethite

fprintf('Mineral:Goethite \n Formula:FeO(OH) \n Percent Iron:62.9 \n Melting Point (Celcius):350')

case limonite

fprintf('Mineral:Limonite \n Formula:2(FeO(OH))*3(H2O) \n Percent Iron:55 \n Melting Point (Celcius):variable')

case Limonite

fprintf('Mineral:Limonite \n Formula:2(FeO(OH))*3(H2O) \n Percent Iron:55 \n Melting Point (Celcius):variable')

case Siderite

fprintf('Mineral:Siderite \n Formula:FeCO3 \n Percent Iron:48.2 \n Melting Point (Celcius):450')

case siderite

fprintf('Mineral:Siderite \n Formula:FeCO3 \n Percent Iron:48.2 \n Melting Point (Celcius):450')

otherwise

disp('Mineral not recognized')

end

Output:

Error using input

Unrecognized function or variable 'siderite'.

Error in HW6P2 (line 1)

user_input=input('Enter the mineral name: ')

Answer 1

[KSSV]

user_input=input('Enter the mineral name: ') ; 
switch user_input
    case 'magnetite'
        fprintf('Mineral:Magnetite \n Formula:Fe3O4 \n Percent Iron:72.4 \n Melting Point (Celcius):1597')
    case 'Magnetite'
        fprintf('Mineral:Magnetite \n Formula:Fe3O4 \n Percent Iron:72.4 \n Melting Point (Celcius):1597')
    case 'hematite'
        fprintf('Mineral:Hematite \n Formula:Fe2O3 \n Percent Iron:69.9 \n Melting Point (Celcius):1565')
    case 'Hematite'
        fprintf('Mineral:Hematite \n Formula:Fe2O3 \n Percent Iron:69.9 \n Melting Point (Celcius):1565')
    case 'Goethite'
        fprintf('Mineral:Goethite \n Formula:FeO(OH) \n Percent Iron:62.9 \n Melting Point (Celcius):350')
    case 'goethite'
        fprintf('Mineral:Goethite \n Formula:FeO(OH) \n Percent Iron:62.9 \n Melting Point (Celcius):350')
    case 'limonite'
        fprintf('Mineral:Limonite \n Formula:2(FeO(OH))*3(H2O) \n Percent Iron:55 \n Melting Point (Celcius):variable')
    case 'Limonite'
        fprintf('Mineral:Limonite \n Formula:2(FeO(OH))*3(H2O) \n Percent Iron:55 \n Melting Point (Celcius):variable')
    case 'Siderite'
        fprintf('Mineral:Siderite \n Formula:FeCO3 \n Percent Iron:48.2 \n Melting Point (Celcius):450')
    case 'siderite'
        fprintf('Mineral:Siderite \n Formula:FeCO3 \n Percent Iron:48.2 \n Melting Point (Celcius):450')
    otherwise
        disp('Mineral not recognized')
end

Enter you input like: 'siderite'

[Craig Johnson]

not working

[Craig Johnson]

still same error

[KSSV]

It is working fine...your input should be in apostrophes.

[Craig Johnson]

thanks i forgot about that stipulation