Taking input and Switch Case using Google Apps Script

//Declaring variables
var ui = SpreadsheetApp.getUi();
// Get the value from the user
var get_text= ui.prompt("Enter any number from 1 to 7").getResponseText();
//Convert the data type to integer
var get_num=parseInt(get_text);
//Comparing the entered number with days in a week
switch(get_num)
 {
   
   case 1:
        ui.alert("Today is sunday");
        break;   
   case 2:
        ui.alert("Today is monday");
        break;
   case 3:
        ui.alert("Today is tuesday");
        break;
   case 4:
        ui.alert("Today is Wednesday")
        break;
   case 5:
       ui.alert("Today is Thursday");
        break;
   case 6:
        ui.alert("Today is Friday");
        break;
   case 7:
        ui.alert("Today is Saturday");
        break;
   default:
         ui.alert("Entered number is not fall between 1 to 7")
 }