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I have two string values using numbers. How to add(not concatenate) the two string values. Could you please help me.

my code:

string num='2016';
system.debug('first:'+num);
Output: 2016

string num1='2016'+'1';
system.debug('second:'+num1);
Output: 20161

But I need 2017.Is it possible or not this way?

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Integer num = Integer.valueOf('2006');
Integer num2 = Integer.valueOf('1');

Integer result = num + num2;
System.debug(result);

Update as per comment, to transform it to a String:

String str = String.valueOf(result);
System.debug(str);
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  • i would however put that in a try/Catch block when you do that as you may throw a conversion error if the values are not formatted properly as numbers that you are trying to parse. – Ronnie Jan 18 '18 at 5:47
  • for brevity I have omitted try/catch – Santanu Boral Jan 18 '18 at 5:48
  • I understand - just thought i would comment it for other users to benefit as well. – Ronnie Jan 18 '18 at 5:51
  • @Santanu Boral, Thankyou for quick reply. The above scenario is working fine. But in the this way I am using string. The same output get using string or not? If possible could you please explain me – Preeth Jan 18 '18 at 5:54
  • you can get it to a string using String str = String.valueOf(result); System.debug(str); – Santanu Boral Jan 18 '18 at 5:58

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