Notes

#include<stdio.h>
int AddNumbers(int n);
int main()
{
int num;
printf("Enter the positive number: ");
scanf("%d",&num);
printf("Sum of natural number : %dn",AddNumbers(num));

}

int AddNumbers(int n)
{
if(n!=0)
return n+ AddNumbers(n-1);
else
return n;
}




#include<stdio.h>
int printOdd(int n1,int n2);
int main()
{
int lowerlimit, upperlimit;
printf("Enter the lowerlimit: ");
scanf("%d",&lowerlimit);
printf("Enter the upperlimit: ");
scanf("%d",&upperlimit);
printf("Even Odd numbers from %d to %d are: ",lowerlimit,upperlimit);
printOdd(lowerlimit ,upperlimit);
return 0;
}

int printOdd(int n1,int n2)
{

if(n1>n2)
return ;
printf("%d, ",n1);

printOdd(n1 + 2, n2);

}

#include<stdio.h>
int fib(int n);
int main()
{
int nth, term;
printf("Enter the term: ");
scanf("%d",&nth);
term = fib(nth);

printf("%dth term of fibonacci series is = %d ",nth,term);

return 0;
}

int fib(int n){

if(n==1){
return 0;
}
else if(n==2){
return 1;
}
else {
return fib(n-1)+ fib(n-2);
}


}
#include<stdio.h>
long int fact(int n);
int main()
{
int num;
printf("Enter the positive number: ");
scanf("%d",&num);
printf("Fact of %d = %ldn",num, fact(num));

}

long int fact(int n)
{
if(n>=1)
return n * fact(n-1);
else
return 1;
}