Written by mandar
First C program to print Hello World from C. How to print Hello World from C? How to give output from C?
/*Program in C to say Hello World*/
#include<stdio.h>
#include<conio.h>
void main()
{
printf("Hello World");
getch();
}The main() function is called first whenever a C program is executed.
printf(“”) takes string arguments and prints on screen.
getch() is written so that program won’t terminate as soon as output is thrown on console.
Written by owneroftechcity
This program checks whether the entered number is prime or not.A prime number is that number divisible by 1 and itself.. we are using same logic to find if a number is prime or not.
/* Remember 1 is neither prime nor composite */
/*Prime Number Or Not C Program in C to check Prime Number. Input a number to know if it's prime or not in C language. C language program to find prime numbers.*/
#include<stdio.h>
#include<conio.h>
void main()
{
int x;
int i=0;
clrscr();
printf("Please enter a number\n");
scanf("%d",&x);
if(x==1)
{
printf("1 is not a prime number");
getch();
}
else if(x==2 || x==3)
{
printf("Entered number is prime");
getch();
}
else
{
for(i=2;i<=(x/2);i++) /*Run loop half the times entered number*/
{
if(x%i==0)
{
printf("Entered number is not a prime number");
getch();
exit(1);
}
}
printf("Enter number is a prime number");
getch();
}
}
It’s easy isn’t It?
Written by owneroftechcity
/* Program to find if number is odd or even in C language */
#include<stdio.h>
#include<conio.h>
void main()
{
int x;
printf("Enter a number \n");
scanf("%d",&x);
if(x%2==0) /* If remainder is 0 after division by 2 number is even */
{
printf("Number is even number");
getch();
}
else
{
printf("number is odd number");
}
}