Answer:
public static String onlyDigits(String in){
String digitsOnly = in.replaceAll("[^0-9]", "");
return digitsOnly;
}
A Complete program is wrtten in the explanation section
Explanation:
public class TestClass {
public static void main(String[] args) {
String a = "-jaskdh2367sd.27askjdfh23";
System.out.println(onlyDigits(a));
}
public static String onlyDigits(String in){
String digitsOnly = in.replaceAll("[^0-9]", "");
return digitsOnly;
}
}
The output: 23672723
The main logic here is using the Java replaceAll method which returns a string after replacing all the sequence of characters that match its argument, regex with an empty string
Answer:
def encrypt_digit(digit):
if type(digit) is int or float:
digit = str(digit)
hold = list()
for x in digit:
d = str((int(x) + 3)%10)
hold.append(d)
first = hold.pop(0)
second = hold.pop(0)
third = hold.pop(0)
fourth = hold.pop()
print(int("".join([third,fourth, first, second])))
encrypt_digit(7836)
Explanation:
The python function accepts a four-digit parameter which represents the data transmitted over the company's telephone network. The function encrypts the data by adding 3 to each digit and getting the modulus of division 10, then the digits are swapped and printed out encrypted and ready for transmission.
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