"var" keyword and different behavior with "string" data type

That's right:

For 1st senario：the operator "+" will convert the "1.0" to string, and combined to "ankur", so the result is just the string, the same type of "x".

For 2nd：y's type is int, but you wanna conbine it with "ankur", the result will be string, string cannot be converted to int.

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