C Exercises: Find Duck Numbers between 1 to 500

Last update on May 27 2022 12:26:01 (UTC/GMT +8 hours)

C Numbers: Exercise-24 with Solution

Write a program in C to find Duck Numbers between 1 to 500.

Sample Solution:

C Code:

# include <stdio.h>
# include <stdlib.h>


int main()
{
    int dno,dkno,r,flg;
	flg=0;
 printf("\n\n Find Duck Numbers between 1 to 500: \n");
 printf(" ----------------------------------------\n");
 printf(" The Duck numbers are: ");
for(dkno=1;dkno<=500;dkno++)
	{
	dno=dkno;
	flg=0;
    while(dno>0)
        {
            if(dno % 10==0)
            {
            flg=1;
            break;

            }
			dno/=10;
        }
            if(dkno>0 && flg==1)
            {
            printf("%d ",dkno);
            }
	}
	printf("\n");
}

Sample Output:

The Duck numbers are: 10 20 30 40 50 60 70 80 90 100 101 102......

Pictorial Presentation:

C programming: Find Duck Numbers between 1 to 500.

Flowchart:

C Programming Code Editor:

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP