What is the reason for the function to return 'undefined' when the variable already holds the accurate result?

Question

What is the reason for the function to return 'undefined' when the variable already holds the accurate result?

I have created a function that aims to calculate the digital root of a given number.

Despite my efforts, I am encountering an issue where this function consistently returns undefined, even though the variable does hold the correct result.

Can you help me identify where I might be going wrong?

    function findDigitalRoot(number: number): number {
        let sum: number = 0;
        while (number > 0) {
            sum += number % 10
            number = Math.floor(number / 10)
        }
        if (sum >= 10) {
            findDigitalRoot(sum)
        } else {
            alert(sum)  //  sum=6
            return sum  //  undefined
        }
    }

    alert(findDigitalRoot(942))  //  undefined

javascript typescript

Answer 1

Answer №1

You are missing a return statement for the condition if(s>=10)

function calculateRoot(number){
    let sum = 0;
    while(number>0){
        sum+=number%10
        number = Math.floor(number /10)
    }
    if (sum>=10){
        return calculateRoot(sum)
    } 
    else{
        alert(sum)//sum=6
        return sum//undefined
    }
    
}
alert(calculateRoot(942))//undefined

Answer 2

You are missing a return statement for the condition if(s>=10)

function calculateRoot(number){
    let sum = 0;
    while(number>0){
        sum+=number%10
        number = Math.floor(number /10)
    }
    if (sum>=10){
        return calculateRoot(sum)
    } 
    else{
        alert(sum)//sum=6
        return sum//undefined
    }
    
}
alert(calculateRoot(942))//undefined

Answer 3

Answer №2

Valid reasoning, however only return when the value of s is greater than 10. Appreciate it.

if (s>10){
      return fibNumber(s);
    }

Answer 4

Valid reasoning, however only return when the value of s is greater than 10. Appreciate it.

if (s>10){
      return fibNumber(s);
    }

What is the reason for the function to return 'undefined' when the variable already holds the accurate result?

Answer №1

Answer №2

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