if statement - Maximum conditions inside if in javascript - Stack Overflow

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Is there any maximum limit of conditions for If in Javascript? I am using following method to detect bombs in division "b". But it skips more than 3 or 4 conditions and hence less bombcount than the actual count.

The following function triggers as soon as I click on div b where b = some number . It has a Kwhere I check for bomb in every cell and if the cell with the bomb satisfies the position criterion it increases bombcount by 1.

    var i = 1;
    var p1 = b-1;
    var p2 = b+1;
    var p3 = b+6;
    var p4 = b-6;
    var p5 = b-5;
    var p6 = b+5;
    var p7 = b-7;
    var p8 = b+7;
    var bombcount = 0;

    while(i<37)
    {
        var check = document.getElementById(i).value;
        if (check == "explode" && b>6 && b<31) {
            if(i==p1 || i==p2 || i==p3 || i==p4 ||
               i==p5 || i==p6 || i==p7 || i==p8) {

               bombcount++
            };
        }
        i++;
    }

Is there any maximum limit of conditions for If in Javascript? I am using following method to detect bombs in division "b". But it skips more than 3 or 4 conditions and hence less bombcount than the actual count.

The following function triggers as soon as I click on div b where b = some number . It has a Kwhere I check for bomb in every cell and if the cell with the bomb satisfies the position criterion it increases bombcount by 1.

    var i = 1;
    var p1 = b-1;
    var p2 = b+1;
    var p3 = b+6;
    var p4 = b-6;
    var p5 = b-5;
    var p6 = b+5;
    var p7 = b-7;
    var p8 = b+7;
    var bombcount = 0;

    while(i<37)
    {
        var check = document.getElementById(i).value;
        if (check == "explode" && b>6 && b<31) {
            if(i==p1 || i==p2 || i==p3 || i==p4 ||
               i==p5 || i==p6 || i==p7 || i==p8) {

               bombcount++
            };
        }
        i++;
    }

• javascript
• if-statement

Share Improve this question Follow edited Apr 18, 2013 at 10:57 Abhishek Umrao asked Apr 18, 2013 at 10:41 Abhishek UmraoAbhishek Umrao 17111 gold badge44 silver badges1111 bronze badges 4

• No, there is no limit. If your code doesn't work as expect, you have to provide a more detailed explanation. – Bergi Commented Apr 18, 2013 at 10:46
• Your code looks not very good. Try to use array for p1..p8 and if will looks like if (array.indexOf(i) != -1) – Dmitry Volokh Commented Apr 18, 2013 at 10:47
• It might be a better idea to revisit your application's logic to avoid such conditionals. – adrianp Commented Apr 18, 2013 at 10:47
• there is no limit, but code looks not nice and hard to read. – Davor Mlinaric Commented Apr 18, 2013 at 10:47

Add a ment  | 

3 Answers 3

Sorted by: Reset to default 4

Use array for p and indexOf to check is i in array:

var p = [b - 1, b + 1, b + 6, b - 6, b + 5, b - 5, b + 7, b - 7];
if (p.indexOf(i) !== -1) {
    bombcount++;
} 

No, there is no limit to number of if-else statements, be it one after another or nested if-else loops. Also, there is as such no limit to number of condition you can have under a if statement.

But, it is better to use switch in those cases. It improves readability and performance.

For switch syntax see this https://developer.mozilla/en-US/docs/JavaScript/Reference/Statements/switch

For using switch over a range of values see this previous post Switch statement for greater-than/less-than

There is no limit. And as a tip, you maybe better off using switch and falling through for these conditions:

 switch (i)  {
     case p1:
     case p2:
     case p3:
             // your logic
             break;

 }

https://developer.mozilla/en-US/docs/JavaScript/Reference/Statements/switch

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