output

[sumaraghavi ragha]

System.out.println(" " + 7 + 2 );
System.out.println( 7 + 2);

why the output first line is 72 and it's 9 for next line

Please expalin

Thanks lot

[Mark Gabb]

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System.out.println(" " + 7 + 2 );
System.out.println( 7 + 2);

why the output first line is 72 and it's 9 for next line
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" " + 7 + 2 = 72, because the first element is a string, therefore it will treat the 7 and 2 being added to a string i.e. 72 being added to the blank string.

7+2 = 9, because the first element is an int and therefore it will add 2 as an int rather than a string.

[Deepak Bala]

Pay attention to the way the + operator overloads based on the types of data in println()