how to use data type char.

[willc1010]

Scanner keyboard = new Scanner(System.in);
float numberMinUsed, totalDue, dayMin, nightMin;
char R, P;

System.out.print("Enter the service code (R or P");
R = keyboard.charAt(). toLowerCase();

*dont know how to use char. i need it to read (r or p) depending on what the user inputs and i want to convert them to lower case so it wont be case sensitive

[guyafe]

Instead of using variables named 'R' and 'P', use a single variable to get input. Something like character_from_user. After reading it, compare to your desired values:

if((character_from_user == 'r') || (character_from_user == 'R')){...code for 'R'...}
else if((character_from_user == 'p') || (character_from_user == 'P')){...code for 'P'...}
else{....error...}

Don't know if you need to verify your input, if so, put it in a while loop.

[keang]

Instead of using variables named 'R' and 'P', use a single variable to get input. Something like character_from_user.

Definitely use sensible names for variables instead a letters but in Java the convention is use camel case rather than underscores so use 'characterFromUser' rather than 'character_from_user'. Having said that personally I would use something more specific like 'serviceCode'.

and i want to convert them to lower case so it wont be case sensitive

The Character class has methods for dealing with char types such as toLower(..).

[ProgramThis]

Definitely use sensible names for variables instead a letters but in Java the convention is use camel case rather than underscores so use 'characterFromUser' rather than 'character_from_user'. Having said that personally I would use something more specific like 'serviceCode'.
The Character class has methods for dealing with char types such as toLower(..).

Or just "input" and check if the input equals R or P K.I.S.S. principle.

[keang]

Or just "input" and check if the input equals R or P K.I.S.S. principle.
Today 11:51 AM

If the variable had a reasonable life expectancy or was valid over a number of lines of code I would stick with the descriptive name but if I was reusing the variable for several inputs or it was only valid in a very confined part of the code I would use 'input' or maybe even 'inp'