JavaScript: Find the sign of product of three numbers

Last update on May 30 2022 10:06:10 (UTC/GMT +8 hours)

JavaScript Conditional Statement and loops: Exercise-2 with Solution

Write a JavaScript conditional statement to find the sign of product of three numbers. Display an alert box with the specified sign.

Sample numbers : 3, -7, 2
Output : The sign is -

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JavaScript conditional statement to find the sign of product of three numbers</title>
</head>
<body>

</body>
</html>

JavaScript Code:

var x=3;
var y=-7;
var z=2;
if (x>0 && y>0 && z>0)
{
       alert("The sign is +");
}
else if (x<0 && y<0 && z<0)
        {
          console.log("The sign is -");
        }
        else if (x>0 && y<0 && z<0)
        {
          console.log("The sign is +");
        }
        else if (x<0 && y>0 && z<0)
        {
          console.log("The sign is +");
        }
        else
        {
          console.log("The sign is -");
        }

Sample Output:

The sign is -

Flowchart:

Live Demo:

See the Pen javascript-conditional-statements-and-loops-exercise-2 by w3resource (@w3resource) on CodePen.

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JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04