practising C, C++ and JAVA programming with examples

program to get sum of series 1 ,3,5,7,.......nth.

//program to get sum of series 1 ,3,5,7,.......nth.
#include<stdio.h>
#include<conio.h>
void main()
{
int k,n;
int s=0;printf(enter value of 'n'\n");
scanf("%d",&n);
for(k=1;k<=n;k=k+2)
{
s=s+k;
}
printf("sum=%d,",s);
getch();
}

program to know a number is divisible by 3 and 5 both or not

//'C' program to know a number is divisible by 3 and 5 both or not
#include<stdio.h>
#include<conio.h>
void main()
{
int x;
printf("enter a number\n");
scanf("%d",&x);
if(x%3==0 && x%5==0)
{
printf("it is divisible by both");
}
else
{
printf("it is not divisible by both\n");
}
getch();
}

program to know a number is even or odd using function

//program to know a number is even or odd
#include<stdio.h>
#include<conio.h>
void evenodd();

void main()
{

evenodd();

getch();

}

void evenodd()

{int x;
printf("enter a number\n");
scanf("%d",&x);
if(x%2==0)
{
printf("it is an even number");
}
else
{
printf("it is an odd number\n");
}

}

program to get greatest number among three numbers

// program to get greatest number among three numbers

#include<stdio.h>

#include<conio.h>

void main()

{

float a,b,c;

printf(“enter three numbers\n”);

scanf(“%f%f%f”,&a,&b,&c);

if(a>b &&a>c)

{

printf(“the greatest number=%f\n”,a);

}

elseif(b>a &&b>c)

{

printf(“the greatest number=%f\n”,b);

}

else

{

printf(“the greatest number=%f\n”,c);

}

getch();

}

program to get sum of 1 to n numbers

//A program to print/display sum of 1 to n natural numbers.
#include<stdio.h>
#include<conio.h>
void main()
{
int k=1,n,sum=0;
printf("enter value of 'n'\n");
scanf("%d",&n);
while(k<=n)
{
sum=sum+k;
k++;
}
printf("sum=%d",sum);getch();
}