Q:

Swift program to calculate the sum of all digits using recursion

belongs to collection: Swift User-defined Functions Programs

YasminRadwan26
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2022-07-10
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Here, we will create a recursive function to calculate the sum of all digits of a specified number and print the result on the console screen.

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YasminRadwan26
2022-07-10
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Program/Source Code:

The source code to calculate the sum of all digits using recursion is given below. The given program is compiled and executed successfully.

// Swift program to calculate the
// sum of all digits using recursion

import Swift

var sum:Int = 0

func SumOfDigits(number:Int)->Int {
    if number > 0 {
        sum += (number % 10)
        return SumOfDigits(number:number / 10)
    }

    return sum
}

var result = SumOfDigits(number:1234)

print("Sum of all digits is: ",result)

Output:

Sum of all digits is:  10

...Program finished with exit code 0
Press ENTER to exit console.

Explanation:

In the above program, we imported a package Swift to use the print() function using the below statement,

import Swift;

Here, we created a global variable sum and recursive function SumOfDigits() to calculate the sum of all digits and printed the result on the console screen.

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