Question

How to check if a number is curious number (sum of the factorials of each digit equal to itself) in TypeScript

Answer 1

function factorial(n: number) {
    return (n == 1 || n == 0) ? 1 : n * factorial(n - 1);
}

function sumFactorialDigits(num: number) {
    let sum: number = 0;
    
    while (num != 0) {
        sum += factorial(Math.trunc(num % 10));
        num = Math.trunc(num / 10);
    }
    
    return sum;
}

let num: number = 145;

if (num == sumFactorialDigits(num)) {
    console.log("Curious number");
}
else {
    console.log("Not curious number");
}




/*
run:
   
"Curious number" 
   
*/

 

70+ SQL courses for beginners and professionals