Find a specific value/characters in a string field (If statement)

Question

I have these string statments:

• 10 - Holiday Booking
• 20 - Summer term
• 34 - Nighttime
• Autumn time

I wanted to create a IF statement which says:

If the start of the string contains 'X - ' (a number and a hyphen with spaces, although I think it will recognise the number as a string type), then keep it as it is, otherwise add a random number and hyphen to the start

• 10 - Holiday Booking
• 20 - Summer term
• 34 - Nighttime
• 55 - Autumn time

I am using Google App Scripts/Java.

Answer 1

The function can be made like this

const str1 = '10 - Holiday Booking';
const str2 = 'Autumn time';

function MyFun(str) {
  const firstAscii = str.charCodeAt(0);
  if( (firstAscii>=65 && firstAscii<=90 ) || (firstAscii>=65 && firstAscii<=90) ){
    str = Math.floor((Math.random() * 100) + 1) + " - " + str;
  }
  console.log(str);
}

MyFun(str1);
MyFun(str2);