var x=1; for(x;x<10;x++) x+=x+100; document.write(x);

Question

Why 103?

Answer 1

x+=x+100
=>
x+=(x+100)
x+=(1+100)
x+=(101)
x=x+101
x=1+101
x=102
x++
x=103
x<10 false. Prints x : 103

Answer 2

Thnx