why the output =0 var arr=[1,2,3,4]; var x=1; for(var i=0;i<arr.length ;i++){ x*=i; } alert (x);

Answer 1

In first iteration : x=x*0 that is x=0
And then in every iteration X will be 0.

For more information do debugging in angularjs using any IDE.

Answer 2

i =0 -->0*x = 0 :)

Answer 3

thanks

Answer 4

The reason is because each time the loop iterates through the that array, it multiplies a number by zero and saves that result. No matter how many numbers you multiply by zero, it will always be zero.

Answer 5

Your loop starts with I equal zero. zero times anything is zero so the first thing your program does is set X equal to zero, from then on it's always zero times a number which comes out to be zero again.

Answer 6

Because any numbers multiplied with zero is always zero. you better to initialise i=1 inside the for loop to get a different output