JavaScript: Check a number from three given numbers where two numbers are equal, find the third one

Last update on May 30 2022 10:01:06 (UTC/GMT +8 hours)

JavaScript Basic: Exercise-111 with Solution

Write a JavaScript program to check a number from three given numbers where two numbers are equal, find the third one.

Pictorial Presentation:

JavaScript: Check a number from three given numbers where two numbers are equal, find the third one.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title> Check a number from three given numbers where two numbers are equal, find the third one</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function find_third_number(x, y, z) {
   if((x!==y) && (x!==z) && (y!==z))
    return "Three numbers are unequal.";
	if(x==y) return z;
	if(x==z) return y;
	return x;
}

console.log(find_third_number(1,2,2))
console.log(find_third_number(1,1,2))
console.log(find_third_number(1,2,3))

Sample Output:

1
2
Three numbers are unequal.

Flowchart:

ES6 Version:

function find_third_number(x, y, z) {
   if((x!==y) && (x!==z) && (y!==z))
    return "Three numbers are unequal.";
	if(x==y) return z;
	if(x==z) return y;
	return x;
}

console.log(find_third_number(1,2,2))
console.log(find_third_number(1,1,2))
console.log(find_third_number(1,2,3))

Live Demo:

See the Pen javascript-basic-exercise-111 by w3resource (@w3resource) on CodePen.

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Next: Write a JavaScript program to find the number of trailing zeros in the decimal representation of the factorial of a given number.

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