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JavaScript While Loop and ">"

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  • 11-02-2014 5:47pm
    #1
    Gerb68
    Registered Users Posts: 266 ✭✭


    I was wondering if anybody could tell me why the following while loop condition does not work in JavaScript:

    var num1 = 6, num2 = 3, result;

    while (num1 > 5)
    {
    num2 += 1;
    }

    result=num1+num2;
    document.write(result);

    I was expecting to loop through just once giving an output of 10

    Thanx for any help.


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  • Options
    #2
    Niall09
    Registered Users Posts: 806 ✭✭✭Niall09


    Gerb68 wrote: »
    I was wondering if anybody could tell me why the following while loop condition does not work in JavaScript:

    var num1 = 6, num2 = 3, result;

    while (num1 > 5)
    {
    num2 += 1;
    }

    result=num1+num2;
    document.write(result);

    I was expecting to loop through just once giving an output of 10

    Thanx for any help.

    The reason it's not just giving one output, is because it's an infinite loop - num1 will always be greater than 5 in your piece of code above. num1 isn't modified in the code so each time the condition is evaluated, it will always be 6 > 5 which is true and so will enter the loop.


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