/// Counts how many times each digit (0–9) appears in a given number
/// and prints the results.
func printDigitFrequency(of number: Int) {
// Array of 10 zeros, index = digit, value = count
var frequency = Array(repeating: 0, count: 10)
// Convert number to a string so we can iterate over characters
let digits = String(number)
// Count each digit
for char in digits {
if let digit = char.wholeNumberValue {
frequency[digit] += 1
}
}
// Print each digit and its frequency
for digit in 0...9 {
print("Digit \(digit): \(frequency[digit]) times")
}
}
// Usage:
printDigitFrequency(of: 120220340501)
/*
run:
Digit 0: 4 times
Digit 1: 2 times
Digit 2: 3 times
Digit 3: 1 times
Digit 4: 1 times
Digit 5: 1 times
Digit 6: 0 times
Digit 7: 0 times
Digit 8: 0 times
Digit 9: 0 times
*/
