Question

What is displayed in the alert dialog box after the following code is executed? var items = 3; for (var i = 1; i <= items; i++) { var result = 1; for (var j = i; j >= 1; j--) { result *= j; } alert("The factorial of " + i + " = " + result); }

Answer 1

Answer:

The factorial of 3=6

Explanation:

Following are the description of the given question

• This is JavaScript code .Here items are the variable that are holding the integer value "3".
• After that there is 2 loop are iterating one is outer and one inner loop.
• When i=1 1<=3 the condition of outer loop is true  the control moves the inner loop .
• In the inner loop there is variable result that is initialized by 1 Now checking the condition of inner loop j=i i.e j=1 1>=1 condition of inner loop is true it executed the statement inside the inner loop  so result =1 .Now we increment the value of i of the outer loop.
• i=2 2<=3 the condition of outer loop is true  the control moves the inner loop .
• In the inner loop there is variable result that is initialized by 1 Now checking the condition of inner loop j=i i.e j=2 2>=1 condition of inner loop is true it executed the statement inside the inner loop  so result =2 .Now we increment the value of i of the outer loop.
• Now i=3 3<=3 the condition of outer loop is true  the control moves the inner loop .
• In the inner loop there is variable result that is initialized by 1 Now checking the condition of inner loop j=i i.e j=3 3>=1 condition of inner loop is true it executed the statement inside the inner loop  so result =6 .Now we increment the value of i of the outer loop.
• i=4 4<=3 the condition of outer loop is false  the control moves from  the outer loop.
• It print The factorial of 3=6