Write a javascript program to find roots of quadratic equation.
// program to solve quadratic equation
let root1, root2;
// take input from the user
let a = prompt("Enter the first number: ");
let b = prompt("Enter the second number: ");
let c = prompt("Enter the third number: ");
// calculate discriminant
let discriminant = b * b - 4 * a * c;
// condition for real and different roots
if (discriminant > 0) {
root1 = (-b + Math.sqrt(discriminant)) / (2 * a);
root2 = (-b - Math.sqrt(discriminant)) / (2 * a);
// result
console.log(`The roots of quadratic equation are ${root1} and ${root2}`);
}
// condition for real and equal roots
else if (discriminant == 0) {
root1 = root2 = -b / (2 * a);
// result
console.log(`The roots of quadratic equation are ${root1} and ${root2}`);
}
// if roots are not real
else {
let realPart = (-b / (2 * a)).toFixed(2);
let imagPart = (Math.sqrt(-discriminant) / (2 * a)).toFixed(2);
// result
console.log(
`The roots of quadratic equation are ${realPart} + ${imagPart}i and ${realPart} - ${imagPart}i`
);
}