// Function to count frequency of each digit (0–9) in a number
fun countDigitFrequency(number: Long): IntArray {
// Array of size 10, each index represents a digit (0–9)
val freq = IntArray(10)
// Convert number to string so we can iterate over each character
for (ch in number.toString()) {
val digit = ch - '0' // Convert character to its numeric digit value
freq[digit]++ // Increment the count for that digit
}
return freq
}
fun main() {
val number = 120220340501L
// Call the function
val frequencies = countDigitFrequency(number)
// Print results
for (digit in 0..9) {
println("Digit $digit appears ${frequencies[digit]} times")
}
}
/*
run:
Digit 0 appears 4 times
Digit 1 appears 2 times
Digit 2 appears 3 times
Digit 3 appears 1 times
Digit 4 appears 1 times
Digit 5 appears 1 times
Digit 6 appears 0 times
Digit 7 appears 0 times
Digit 8 appears 0 times
Digit 9 appears 0 times
*/
