Left-Aligned Triangle Pattern Programs in C

Pattern Name

Left-Aligned Right-Angled Triangle Star Pattern 

Other acceptable names:

• Increasing Star Triangle Pattern

• Left-Aligned Triangle Pattern

• Right-Angled Star Triangle

• Half Pyramid Pattern using Stars

This is one of the most classic patterns for beginners in C programming

🔷 Left-Aligned 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 = 1; j <= i; j++)
        {
            printf("%d ", k++);
        }

        printf("\n");
    }

    return 0;
}

🔷 Triangle Binary Number 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 = 1; j <= i; j++)
        {
            printf("%d ", j % 2);
        }

        printf("\n");
    }

    return 0;
}

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

*

* *

* * *

* * * *

* * * * *

#include<stdio.h>

int main( )

{

int num,i,j;

printf("Enter the number:\n");

scanf("%d",&num);

for(i=1;i<=num;i++)

{

        for(j=1;j<=i;j++)

        {

                printf("* ");

        }

        printf("\n");

}

}

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

1

2 2

3 3 3

4 4 4 4

5 5 5 5 5

#include<stdio.h>

int main( )

{

int num,i,j;

printf("Enter the number:\n");

scanf("%d",&num);

for(i=1;i<=num;i++)

{

        for(j=1;j<=i;j++)

        {

                printf("%d ",i);

        }

        printf("\n");

}

}

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

1

1 2

1 2 3

1 2 3 4

1 2 3 4 5

#include<stdio.h>

int main( )

{

int num,i,j;

printf("Enter the number:\n");

scanf("%d",&num);

for(i=1;i<=num;i++)

{

        for(j=1;j<=i;j++)

        {

                printf("%d ",j);

        }

        printf("\n");

}

}

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

A

B B

C C C

D D D D

E E E E E

#include<stdio.h>

int main( )

{

int num,i,j;

printf("Enter the number:\n");

scanf("%d",&num);

for(i=1;i<=num;i++)

{

        for(j=1;j<=i;j++)

        {

                printf("%c ",i+64);

        }

        printf("\n");

}

}
***********************************************  

A

A B

A B C

A B C D

A B C D E

#include<stdio.h>

int main( )

{

int num,i,j;

printf("Enter the number:\n");

scanf("%d",&num);

for(i=1;i<=num;i++)

{

        for(j=1;j<=i;j++)

        {

                printf("%c ",j+64);

        }

        printf("\n");

}

}

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

5

4 4

3 3 3

2 2 2 2

1 1 1 1 1

#include<stdio.h>

int main( )

{

int num,i,j;

printf("Enter the number:\n");

scanf("%d",&num);

for(i=num;i>=1;i--)

{

        for(j=num;j>=i;j--)

        {

                printf("%d ",i);

        }

        printf("\n");

}

}