11) Write a program that finds persistence value of given number using Do-While control statement.

program:  Write a program that determines persistence value of given number.

Input 2 digit positive integer number through keyboard.
e.g. persistence value of 49 is 3. 49,4*9=36, 3*6=18 , 1*8=1.
e.g. persistence value of 77 is 4. 77,7*7=49, 4*9=36, 3*6=18 , 1*8=1.

source file name: persitval.C

void main()

{

int n,d1,d2,pdno,pv;

clrscr();

printf("\n  enter 2 digit number: ");

scanf("%d",&n);

pv=0;

pdno=n;

do

{

d1=n%10;

n=n/10;

d2=n%10;

pv++;

pdno=d1*d2;

n=pdno;

}while(pdno>9);

printf("\n persistence value is %d ",pv);

getch();

}

output: