Program to Check if a number is Prime or not

#include<stdio.h>

#include<conio.h>
void main()
{

int n,i=2,count=0;

printf("Enter the No.\n");

scanf("%d",&n);

while(i<=n/2)

{

if(n%i==0)

count++;

i++;

}

if(count==0)

printf("The No. is Prime");

else

printf("The No. is Not Prime");

getch();

}

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Program to Add,Subtract,Multiply,Divide

#include<stdio.h>

#include<conio.h>
void main()
{

int a,b,add,sub,mul,div;

printf("Enter the Value of a & b\n");

scanf("%d%d",&a,&b);

add=a+b;

sub=a-b;

mul=a*b;

div=a/b;

printf("Addition=%d\n Subtraction=%d\n Multiplication=%d\n Division=%d\n",add,sub,mul,div);

getch();

}

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Program to convert Kilometer to Meter

#include<stdio.h>

#include<conio.h>
void main()
{
int km,mtr;
printf("Enter the Value\n");
scanf("%d",&km);
mtr=km*1000;
printf("Converted Value is &d",mtr);
getch();
}

Output

Enter the Value
5
Converted Value is 5000

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Program to Swap two No.'s

#include<stdio.h>

#include<conio.h>
void main()
{
int a,b,temp;
printf("Enter The Values\n");
scanf("%d%d",&a,&b);
temp=a;
a=b;
b=temp;
printf("Swaping of No. is %d%d",a,b);
getech();
}

Output
Enter The Values
1
2
Swaping of No. is 2 1

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Program to Input a no. and Sum it

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b,sum;

printf("Enter The No. \n");

scanf("%d%d",&a,&b);

sum=a+b;

printf("Sum of two no. is%d",sum);

getch();

}

Output

Enter The No.

2
3

Sum of two no. is 5

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