Day 21: Quadratic Equation of 100DaysCodingChallenge

Hello all, 

I have started the 100 days of coding challenge to improve my programming skills..

Today is the Day21 of 100DaysCodingChallenge for 

Quadratic Equation taken inputs by the user.

Code : 

let a = prompt("Enter a : ");
let b = prompt("Enter b : ");
let c = prompt("Enter c : ");
let d = (b*b) - (4*a*c);
if (d > 0) {
  console.log("The roots are real and different.");
  let root1 = (-b-Math.sqrt(d))/2*a;
  let root2 = (-b+Math.sqrt(d))/2*a;
  console.log("The real and different roots are : ", root1, root2);
} else if (d == 0) {
  console.log("The roots are real and equal.");
  let root1 = root2 = -b/2*a;
  console.log("The real and equal roots are : ", root1, root2);
} else {
  console.log("The roots are complex and different.");
  let realPart = -b/(2*a);
  let imaginaryPart = Math.sqrt(-d)/(2*a);
  console.log("root1 = ", realPart, "+", "i", imaginaryPart);
console.log("root1 = ", realPart, "+", "i", imaginaryPart);
}

Output :     

Happy Coding:)

Day 21 Of 100 Days Coding Challenge 

Thank you...