Javascript quiz #1 solution 1

Q1

1. window.alert(window.alert("hello"));

Ans1. At First it it will display alert a message with hello and after clicking ok button it will display an alert box with message undefined.

Q2. window.alert( );
Ans2: display alert box with blank message.

Q3. window.alert(console.log("@double-u has more 2700000 "));
Ans3: alert box with undefined messsage and output in console @double-u has more 2700000

Q4 . var x = 1;
console.log("window.alert( x++ )");
Ans4. output in console window.alert( x++ )

Q5 console.log(@afrog is attending the quiz);
Ans 5: Syntax error because no variable with name @afrog is attending the quiz

Q6 {

           var x = 20 ;
            for(i=0; i<x ; i++)
            { 
              console.log("x is now " + x ); 
            }

}

Ans 6: output in console x is now 20 20 times

Q7:what will be the output if in question number 6 after console.log("x is now " + x ); the next line of code is added as :
a) x--;
b) x= x-20;
c) x=x-i;
d) x= x++ + --x;

Ans 7:
at x--
output will be
x is now 20
x is now 19
x is now 18
x is now 17
x is now 16
x is now 15
x is now 14
x is now 13
x is now 12
x is now 11
because at x=11 i is greater loop will terminate

at x=x-20
output x is now 20

at x=x-i;
Output will be
x is now 20
x is now 20
x is now 19
x is now 17
x is now 14
x is now 10

x= x++ + --x
x is now infinity