Patterns in C

1. WAP to print the given pattern

1
12
123
1234
12345

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= i; j++)
        {
            printf("%d", j);
        }
        printf("\n");
    }
    return 0;
}

2. WAP to print the given pattern

12345
1234
123
12
1

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = n; i >= 1; i--)
    {
        for (int j = 1; j <= i; j++)
        {
            printf("%d", j);
        }
        printf("\n");
    }
    return 0;
}

3. WAP to print the given pattern

1
21
321
4321
54321

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = 1; i <= n; i++)
    {
        for (int j = i; j >= 1; j--)
        {
            printf("%d", j);
        }
        printf("\n");
    }
    return 0;
}

4. WAP to print the given pattern

54321
4321
321
21
1

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = n; i >= 1; i--)
    {
        for (int j = i; j >= 1; j--)
        {
            printf("%d", j);
        }
        printf("\n");
    }
    return 0;
}

5. WAP to print the given pattern

1
22
333
4444
55555

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= i; j++)
        {
            printf("%d", i);
        }
        printf("\n");
    }
    return 0;
}

6. WAP to print the given pattern

55555
4444
333
22
1

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = n; i >= 1; i--)
    {
        for (int j = 1; j <= i; j++)
        {
            printf("%d", i);
        }
        printf("\n");
    }
    return 0;
}

7. WAP to print the given pattern

*
**
***
****
*****

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= i; j++)
        {
            printf("*");
        }
        printf("\n");
    }
    return 0;
}

8. WAP to print the given pattern

    *
   **
  ***
 ****
*****

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n - i; j++)
        {
            printf(" ");
        }
        for (int k = 1; k <= i; k++)
        {
            printf("*");
        }
        printf("\n");
    }
    return 0;
}

9. WAP to print the given pattern

    *
   ***
  *****
 *******
*********

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n - i; j++)
        {
            printf(" ");
        }
        for (int k = 1; k <= i; k++)
        {
            printf("*");
        }
        for (int m = 1; m <= i - 1; m++)
        {
            printf("*");
        }
        printf("\n");
    }
    return 0;
}

10. WAP to print the given pattern

A
AB
ABC
ABCD
ABCDE

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = 1; i <= n; i++)
    {
        char ch = 'A';
        for (int j = 1; j <= i; j++)
        {
            printf("%c", ch);
            ch++;
        }
        printf("\n");
    }
    return 0;
}

11. WAP to print the given pattern

A
BB
CCC
DDDD
EEEEE

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    char ch = 'A';
    for (int i = 1; i <= n; i++)
    {

        for (int j = 1; j <= i; j++)
        {
            printf("%c", ch);
        }
        ch++;
        printf("\n");
    }
    return 0;
}

12. WAP to print the given pattern

    1
   121
  12321
 1234321
123454321

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n - i; j++)
        {
            printf(" ");
        }
        for (int k = 1; k <= i; k++)
        {
            printf("%d", k);
        }
        for (int m = i - 1; m >= 1; m--)
        {
            printf("%d", m);
        }
        printf("\n");
    }
    return 0;
}

13. WAP to print the given pattern

    *
   * *
  * * *
 * * * *
* * * * *

Code:

#include <stdio.h>
int main()
{
    int n = 5;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n - i; j++)
        {
            printf(" ");
        }
        for (int k = 1; k <= i; k++)
        {
            printf("* ");
        }

        printf("\n");
    }
    return 0;
}

14. WAP to print the given pattern [Floyd's Triangle]

1
23
456
78910

Code:

#include <stdio.h>
int main()
{
    int n = 5, ctr = 1;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= i; j++)
        {
            printf("%d", ctr);
            ctr++;
        }
        printf("\n");
    }
    return 0;
}