# Input a number and check digits are in ascending order or not using while loop in C

###### while Loop - Question 13

In this question, we will see how to input a number and check if the digits are in ascending order or not in C programming using while loop. To know more about while loop click on the while loop lesson.

**Q13)** Write a program in C to input a number and check if the digits are in ascending order or not using while loop.

#### Program

```
#include <stdio.h>
#include <conio.h>
int main()
{
int n,d,td=0,ld=10,asc=0;
printf("Enter any number ");
scanf("%d",&n);
while(n>0)
{
d=n%10;
if(d<ld)
{
ld=d;
asc=asc+1; // counting the digits present in the number in ascending order
}
td=td+1; // counting the total number of digits
n=n/10;
}
if(td==asc)
{
printf("All digits are in ascending order");
}
else
{
printf("All digits are not in ascending order");
}
return 0;
}
```

#### Output

Enter any number 1469 All digits are in ascending order