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

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:

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

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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Previous: Write a JavaScript program to find the number of even values in sequence before the first occurrence of a given number.
Next: Write a JavaScript program to find the number of trailing zeros in the decimal representation of the factorial of a given number.

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JavaScript: Tips of the Day

Classes/function constructors

class Person {
  constructor() {
    this.name = 'Owen';
  }
}

Person = class AnotherPerson {
  constructor() {
    this.name = 'Eddie';
  }
};

const member = new Person();
console.log(member.name);

We can set classes equal to other classes/function constructors. In this case, we set Person equal to AnotherPerson. The name on this constructor is Eddie, so the name property on the new Person instance member is "Eddie".

Ref: https://bit.ly/3jFRBje