Javascript, For loop: returned 'i' value is different from that is stored -


in loop alert(i) alerts 12,and firebug displays 10 end result.

 for(var i=0;i<=10;i=i+2){       document.write=i;     }      alert(i);

i gets incremented after every iteration of loop. when fails condition <= 10 loop breaks: 

0 => loop gets executed, incremented 2 2 => loop gets executed, incremented 2 4 => loop gets executed, incremented 2 6 => loop gets executed, incremented 2 8 => loop gets executed, incremented 2 10 => loop gets executed, incremented 2 12 => loop breaks => remains @ 12

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