How can I get current sheet name?

Question

I want copy current sheet to new one and sheet name change.

var ss = SpreadsheetApp.getActiveSpreadsheet();
var sourceSheet = ss.getSheetByName('sheet_name');  <=== question 1
var copy = sourceSheet.copyTo(ss);
ss.setActiveSheet(copy);// set it active
ss.moveActiveSheet(ss.getNumSheets());// move it to the last position 
copy.setName(' newSheetName is add 1 from current sheet name'); <== question 2

question 1:
I need current sheet name or ID.

question 2:
if current sheet name is '10', add 1 for new Sheet name
I don't know how to add string type of sheet name.

Answer 1

Question 1:

The Id refer to the spreadsheet, the name refer to the sheet. If you want to get the name of the sheet, take a look at the documentation on sheet.getName() method.

To get the name the active sheet:

var actualSheetName = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getName();

Question 2:

You can use the substring method to get the last characters of the sourceSheet string and use parseInt method to manipulate the characters as int value.

Example: Your sheet's name is '10'. You only need the parseInt method like:

var temp = parseInt(sourceSheet);
temp += 1;
copy.setName(temp.toString());