Hello dear my fellow friends today we discussed the how the print digits of a number in reaverse order.
Example or test cases
input : 1234
output : 4 3 2 1
input : 2390
output : 0 9 3 2
Approch
1.we take the modula of the number by 10 then we get always last digit of a number.
for example
num = 123
divide the num by 10
num % 10 = 3
num = 4562
num % 10 = 2
it means we clear about this concept if we required last digit of number then we take the modula of number by 10 and get the last digit .
In second we required next digit so we reduced the num by num/10
for example
num = 123
num % 10 = 3
num = num / 10
num = 123 / 10
num = 12
ok then our num is reduced from 123 to 12
We repeat both the step until num is not zero.
ok let’s move for coding section I used c, cpp, java and python language if you comming from another programming language so you can convert this code into your progamming language.
java
class HelloWorld {
public static void main(String[] args) {
System.out.println(“Enter a number”);
Scanner sc = new Scanner(System.in) ;
int n = sc.nextInt(); //take input from user
printDigits(n) ; // call the printDigits function which print the all digits of a number in reverse order
}
public static void printDigits(int n) {
while(n != 0) {
System.out.print(n % 10 + ” “);
n /= 10;
}
}
}
C
#include <stdio.h>
void printDigits(int n) {
while(n != 0) {
printf(“%d “, n % 10);
n /= 10;
}
}
int main() {
printf(“Enter a number: “);
int n;
scanf(“%d”, &n);
printDigits(n);
return 0;
}
cpp
void printDigits(int n) {
while(n != 0) {
std::cout << n % 10 << ” “;
n /= 10;
}
}
int main() {
std::cout << “Enter a number: “;
int n;
std::cin >> n;
printDigits(n);
return 0;
}
python
while n != 0:
print(n % 10, end=” “)
n //= 10
n = int(input(“Enter a number: “))
print_digits(n)
javascript
while (n !== 0) {
process.stdout.write(n % 10 + ” “);
n = Math.floor(n / 10);
}
}
console.log(“Enter a number:”);
let n = parseInt(prompt());
printDigits(n);
if you have any doubt related to this question please comment your doubt.
if you are beggerner in coding please follow this series we covered complete dsa.
dsa #programming #daydsa Sure, here you go:
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