JavaScript While Loop and ">"

Gerb68 · 11-02-2014 5:47pm #1

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.

Niall09 · 11-02-2014 6:00pm

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.

JavaScript While Loop and ">"

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