C Program to find out leap year

Write a program to find entered year is a leap year or not a leap year.

#include<conio.h>
#include<stdio.h>
void main()
{
int year;
clrscr();
printf("Enter Year:");
scanf("%d",&year);
if(year%4==0 || year%400==0)
{
printf("%d is leap year...!!!",year);
}
else
{
printf("%d is not a leap year...!!!",year);
}
getch();
}

O/P:

C Programming for beginners, Patterns using nested for loop, Pattern 24

Pattern 24

write a prog. to print following pattern

A

AB

ABC

ABCD

ABCDE

#include<conio.h>
#include<stdio.h>
void main()
{
int n=0,m=66,i,j;
clrscr();
printf("Enter N:");
scanf("%d",&n);
printf("\n\n");
for(i=0;i<n;i++)
{
m=65;
for(j=0;j<=i;j++,m++)
{
printf("%c",m);
if(m>=90)
{
m=64;
}
}
printf("\n");
}
getch();
}

O/P:

C Programming for beginners, Patterns using nested for loop, Pattern 23

Pattern 23

write a prog. to print following pattern

B

BD

BDF

BDFH

BDFHJ

#include<conio.h>
#include<stdio.h>
void main()
{
int n=0,m=66,i,j;
clrscr();
printf("Enter N:");
scanf("%d",&n);
printf("\n\n");
for(i=0;i<n;i++)
{
m=66;
for(j=0;j<=i;j++,m+=2)
{
printf("%c",m);
if(m>=90)
{
m=64;
}
}
printf("\n");
}
getch();
}


O/P:

C Programming for beginners, Patterns using nested for loop, Pattern 22

Pattern 22

write a prog. to print following pattern

A

AC

ACE

ACEG

ACEGI

#include<conio.h>
#include<stdio.h>
void main()
{
int n=0,m=65,i,j;
clrscr();
printf("Enter N:");
scanf("%d",&n);
printf("\n\n");
for(i=0;i<n;i++)
{
m=65;
for(j=0;j<=i;j++,m+=2)
{
printf("%c",m);
if(m>88)
{
m=63;
}
}
printf("\n");
}
getch();
}

O/P:

C Programming for beginners, Patterns using nested for loop, Pattern 21

Pattern 21

write a prog. to print following pattern

1

35

791

3579

13579

#include<conio.h>
#include<stdio.h>
void main()
{
int n=0,m=1,i,j;
clrscr();
printf("Enter N:");
scanf("%d",&n);
printf("\n\n");
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++,m+=2)
{
if(m>9)
{
m=1;
}
printf("%d",m);
}
printf("\n");
}
getch();
}


O/P:

C Programming for beginners, Patterns using nested for loop, Pattern 20

Pattern 20

write a prog. to print following pattern

0

02

024

0246

02468

#include<conio.h>
#include<stdio.h>
void main()
{
int n=0,m,i,j;
clrscr();
printf("Enter N:");
scanf("%d",&n);
printf("\n\n");
for(i=1;i<=n;i++)
{
m=0;
for(j=1;j<=i;j++,m+=2)
{
if(m>8)
{
m=0;
}
printf("%d",m);
}
printf("\n");
}
getch();
}


O/P:

C Programming for beginners, Patterns using nested for loop, Pattern 19

Pattern 19

write a prog. to print following pattern

1

13

135

1357

13579

#include<conio.h>
#include<stdio.h>
void main()
{
int n=0,m,i,j;
clrscr();
printf("Enter N:");
scanf("%d",&n);
printf("\n\n");
for(i=1;i<=n;i++)
{
m=1;
for(j=1;j<=i;j++,m+=2)
{
if(m>9)
{
m=1;
}
printf("%d",m);
}
printf("\n");
}
getch();
}


O/P:

C Programming for beginners, Patterns using nested for loop, Pattern 18

Pattern 18

write a prog. to print following pattern

0

22

444

6666

88888

#include<conio.h>
#include<stdio.h>
void main()
{
int n=0,m=0,i,j;
clrscr();
printf("Enter N:");
scanf("%d",&n);
printf("\n\n");
for(i=1;i<=n;i++,m+=2)
{
if(m>8)
{
m=0;
}
for(j=1;j<=i;j++)
{
printf("%d",m);
}
printf("\n");
}
getch();
}


O/P:

C Programming for beginners, Patterns using nested for loop, Pattern 17

Pattern 17

write a prog. to print following pattern

1

33

555

7777

99999

#include<conio.h>
#include<stdio.h>
void main()
{
int n=0,m=1,i,j;
clrscr();
printf("Enter N:");
scanf("%d",&n);
printf("\n\n");
for(i=1;i<=n;i++,m+=2)
{
if(m>9)
{
m=1;
}
for(j=1;j<=i;j++)
{
printf("%d",m);
}
printf("\n");
}
getch();
}

O/P:

C Programming for beginners, Patterns using nested for loop, Pattern 16

Pattern 16

write a prog. to print following pattern

A

BB

CCC

DDDD

EEEEE

#include<conio.h>
#include<stdio.h>
void main()
{
int n=0,m=65,i,j;
clrscr();
printf("Enter N:");
scanf("%d",&n);
printf("\n\n");
for(i=0;i<n;i++)
{
for(j=0;j<=i;j++)
{
printf("%c",m);
}
printf("\n");
m++;
if(m>90)
{
m=64;
}
}
getch();
}


O/P: