Triangle Pattern Programs in C with Output

🔢 C Program to Print Continuous Number Triangle Pattern

#include <stdio.h>

int main()
{
    int num, k = 0;

    printf("Enter the number:\n");
    scanf("%d",&num);

    for(int i=1;i<=num;i++)
    {
        for(int j=i;j<=num;j++)
        {
            printf("%d ",k++);
        }

        printf("\n");
    }

    return 0;
}
  

💡 Sample Output (Input: 5)

0 1 2 3 4
5 6 7 8
9 10 11
12 13
14
  

🔢 C Program to Print Repeated Binary Triangle Pattern

#include <stdio.h>

int main()
{
    int num;

    printf("Enter the number:\n");
    scanf("%d",&num);

    for(int i=1;i<=num;i++)
    {
        for(int j=i;j<=num;j++)
        {
            printf("%d ",i%2);
        }

        printf("\n");
    }

    return 0;
}
  

💡 Sample Output (Input: 5)

1 1 1 1 1
0 0 0 0
1 1 1
0 0
1
  

🔢 C Program to Print Binary Number Triangle Pattern

#include <stdio.h>

int main()
{
    int num;

    printf("Enter the number:\n");
    scanf("%d",&num);

    for(int i=1;i<=num;i++)
    {
        for(int j=i;j<=num;j++)
        {
            printf("%d ",j%2);
        }

        printf("\n");
    }

    return 0;
}
  

💡 Sample Output (Input: 5)

1 0 1 0 1
0 1 0 1
1 0 1
0 1
1
  

⭐ C Program to Print Inverted Star Pattern

#include <stdio.h>

int main()
{
    int num;

    printf("Enter the number:\n");
    scanf("%d",&num);

    for(int i=1;i<=num;i++)
    {
        for(int j=i;j<=num;j++)
        {
            printf("* ");
        }

        printf("\n");
    }

    return 0;
}
  

💡 Sample Output (Input: 5)

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

🔤 C Program to Print Reverse Repeated Alphabet Triangle Pattern

#include <stdio.h>

int main()
{
    int num;

    printf("Enter the number:\n");
    scanf("%d",&num);

    for(int i=num;i>=1;i--)
    {
        for(int j=i;j>=1;j--)
        {
            printf("%c ",i+64);
        }

        printf("\n");
    }

    return 0;
}
  

💡 Sample Output (Input: 5)

E E E E E
D D D D
C C C
B B
A
  

🔤 C Program to Print Reverse Alphabet Triangle Pattern

#include <stdio.h>

int main()
{
    int num;

    printf("Enter the number:\n");
    scanf("%d",&num);

    for(int i=num;i>=1;i--)
    {
        for(int j=i;j>=1;j--)
        {
            printf("%c ",j+64);
        }

        printf("\n");
    }

    return 0;
}
  

💡 Sample Output (Input: 5)

E D C B A
D C B A
C B A
B A
A
  

🔤 C Program to Print Repeated Alphabet Triangle Pattern

#include <stdio.h>

int main()
{
    int num;

    printf("Enter the number:\n");
    scanf("%d",&num);

    for(int i=1;i<=num;i++)
    {
        for(int j=i;j<=num;j++)
        {
            printf("%c ",i+64);
        }

        printf("\n");
    }

    return 0;
}
  

💡 Sample Output (Input: 5)

A A A A A
B B B B
C C C
D D
E
  

🔤 C Program to Print Alphabet Triangle Pattern

#include <stdio.h>

int main()
{
    int num;

    printf("Enter the number:\n");
    scanf("%d",&num);

    for(int i=1;i<=num;i++)
    {
        for(int j=i;j<=num;j++)
        {
            printf("%c ",j+64);
        }

        printf("\n");
    }

    return 0;
}
  

💡 Sample Output (Input: 5)

A B C D E
B C D E
C D E
D E
E
  

🔢 C Program to Print Repeated Number Triangle Pattern

#include <stdio.h>

int main()
{
    int num;

    printf("Enter the number:\n");
    scanf("%d",&num);

    for(int i=1;i<=num;i++)
    {
        for(int j=i;j<=num;j++)
        {
            printf("%d ",i);
        }

        printf("\n");
    }

    return 0;
}
  

💡 Sample Output (Input: 5)

1 1 1 1 1
2 2 2 2
3 3 3
4 4
5
  

🔢 C Program to Print Descending Number Pattern

#include <stdio.h>

int main()
{
    int num;

    printf("Enter the number:\n");
    scanf("%d",&num);

    for(int i=1;i<=num;i++)
    {
        for(int j=i;j<=num;j++)
        {
            printf("%d ",j);
        }

        printf("\n");
    }

    return 0;
}
  

📝 Explanation:

This C program prints a descending number pattern using nested loops. The outer loop controls the rows, while the inner loop prints numbers starting from the current row number up to the entered number.

💡 Sample Output (Input: 5)

1 2 3 4 5
2 3 4 5
3 4 5
4 5
5