Question

var x = 1; for (var i = 0; i < 3; i++) { x += 5 * i; } console.log(x);

Answer 1

the answer is
5*0=0
5*1=5
5*2=10

Answer 2

Given : x = 1

Iteration 1 :

for( i=0 ; i < 3 ; i++ )

x + = 5 * i ( x = x + 5 * i )

= 1 + = 5 * 0 ( x = 1 + 5 * 0 )

x = 1

Iteration 2 :

for ( i=1 ; i < 3 ; i++ )

x + = 5 * i

= 1 + = 5 * 1 ( x = 1 + 5 * 1 )

x=6

Iteration 3 :

for ( i=2 ; i < 3 ; i++ )

x + = 5 * i

6 + = 5 * 2 ( x = 6 + 5 * 2 )

x=16

When proceeding for next iteration ie; i=3 checks with the for loop for ( i = 3 ; 3 < 3 ; i++ )

It fails the condition in for loop,Thus Exit the Loop and moves to the next line Console.log(x)

Now the Current value for x=16

Hence the output is x = 16.