Reverse Number C Program, Number Reversing in C programming, Best way to reverse a number
#include <stdio.h>
int main()
{
int n, reversedNumber = 0, remainder;
printf("Enter an integer: ");
scanf("%d", &n);
while(n != 0)
{
remainder = n%10;
reversedNumber = reversedNumber*10 + remainder;
n /= 10;
}
printf("Reversed Number = %d", reversedNumber);
return 0;
}
Enter an integer: 2345 Reversed Number = 5432
This program takes an integer input from the user. Then the while loop is used until n != 0
is false. In each iteration of while loop, the remainder when n is divided by 10 is calculated and the value of n is reduced by times.
Reverse Number C Program, Number Reversing in C programming, Best way to reverse a number
int main()
{
int n, reverse = 0;
printf("Enter a number to reverse\n");
scanf("%d", &n);
while (n != 0)
{
reverse = reverse * 10;
reverse = reverse + n%10;
n = n/10;
}
printf("Reverse of entered number is = %d\n", reverse);
return 0;
}
Reverse Number C Program, Number Reversing in C programming, Best way to reverse a number
Reverse number C program using recursion
#include <stdio.h>
long reverse(long);
int main()
{
long n, r;
scanf("%ld", &n);
r = reverse(n);
printf("%ld\n", r);
return 0;
}
long reverse(long n) {
static long r = 0;
if (n == 0)
return 0;
r = r * 10;
r = r + n % 10;
reverse(n/10);
return r;
}
Reverse Number C Program, Number Reversing in C programming, Best way to reverse a number
#include <stdio.h> /* Iterative function to reverse digits of num*/ int reversDigits( int num) { int rev_num = 0; while (num > 0) { rev_num = rev_num*10 + num%10; num = num/10; } return rev_num; } /*Driver program to test reversDigits*/ int main() { int num = 4562; printf ( "Reverse of no. is %d" , reversDigits(num)); getchar (); return 0; } |
Reverse Number C Program, Number Reversing in C programming, Best way to reverse a number
Using goto function
#include<stdio.h>
int main() {
int i=0,rev=0,n;
printf("n:");
scanf("%d",&n);
x:if(n>0)
rev=rev*10+n%10;
n=n/10;
if(n>0)
goto x;
printf("%d",rev);
}
Reverse Number C Program, Number Reversing in C programming, Best way to reverse a number
Reverse a Number using For Loop in C Programming
#include<stdio.h>
int main()
{
int num, sum = 0, rem, temp;
printf("\nEnter a Number:\t");
scanf("%d", &num);
for(temp = num; num > 0;)
{
rem = num%10;
sum = (sum*10) + rem;
num = num/10;
}
printf("\nReverse of %d:\t%d\n", temp, sum);
return 0;
}
Reverse Number C Program, Number Reversing in C programming, Best way to reverse a number
Method 3: C Program Code To Reverse a Number using Function
#include<stdio.h>
int reverse(int x);
int main()
{
int num, res;
printf(“\nEnter a Number:\t”);
scanf(“%d”, &num);
res = reverse(num);
printf(“\nReverse of %d:\t%d\n”, num, res);
return 0;
}
int reverse(int x)
{
int rem, sum = 0;
while(x > 0)
{
rem = x%10;
sum = (sum*10) + rem;
x = x/10;
}
return sum;
}
C Program to Reversing an Array Elements in C Programming
#include<stdio.h>
int main() {
int arr[30], i, j, num, temp;
printf(“\nEnter no of elements : “);
scanf(“%d”, &num);
//Read elements in an array
for (i = 0; i < num; i++) {
scanf(“%d”, &arr[i]);
}
j = i – 1; // j will Point to last Element
i = 0; // i will be pointing to first element
while (i < j) {
temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
i++; // increment i
j—; // decrement j
}
//Print out the Result of Insertion
printf(“\nResult after reversal : “);
for (i = 0; i < num; i++) {
printf(“%d \t”, arr[i]);
}
return (0);
}
|
Output :
1
2
3
|
Enter no of elements : 5
11 22 33 44 55
Result after reversal : 55 44 33 22 11
|
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