In function a() why is x and y have the exact same output, can anyone explain the logic?

Question

function a(){
for(x=1;x<5;x++){
x+=x;
}
for(y=1;y<6;y++){
y+=y;
}
console.log(x);
console.log(y);
}
a();

Answer 1

Starting with x = 1, we get
x +=x => x = 1 + 1 = 2;
Then x++ resulted into x = x + 1 = 2 + 1 = 3

Now x = 3 which is less than 5, loop continues, we get
x +=x => x = 3 + 3 = 6;
Again x++ resulted into x = x + 1 = 6 + 1 = 7

Now since the 7<5 failed, loop exits.

Same is for variable y

Answer 2

Thanks Devender Mahajan