Google excel script help

Its probs simple but i cant work it out lol

var subject = SpreadsheetApp.getActiveSheet( ).getRange("Custome text + cell C5").getValue();

how would i get that to read like that so it combines my custom text + cell c5?
Thanks

Solved it as followed

var A ='Custom text ';
var B = SpreadsheetApp.getActiveSheet( ).getRange ("C5").getValue();
var subject = A+B