Console

console.log('Hello world!');
console.warn('hello %s', 'World');
console.error(new Error('Oops!'));

Arithmetic Operators

5 + 5 = 10     // Addition 
10 - 5 = 5     // Subtraction 
5 * 10 = 50    // Multiplication 
10 / 5 = 2     // Division 
10 % 5 = 0     // Modulo

Comments

// This line will denote a comment  
/*   
The below configuration must be  
changed before deployment.  
*/