C Number Pattern Program - programming-point.com

Developing a number pattern program in C is simple if you are familiar with loops. To display a number pattern program, at least two nested loops are required. The outer loop is used for rows, and the inner loop is used to display columns. Loops can be made using the while or for loop but writing programs using for loop is more straightforward than the while loop. Following is the list of programs:

Pattern 1

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

Pattern 2

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

Pattern 3

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

Pattern 4

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

Pattern 5

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

Pattern 6

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

Pattern 7

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

Pattern 8

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

Pattern 9

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

Pattern 10

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

Pattern 11

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

Pattern 12

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

Pattern 13

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

Pattern 14

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

Pattern 15

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

Pattern 16

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

Pattern 17

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

Pattern 18

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

Pattern 19

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

Pattern 20

Program
#include<stdio.h>
int main()
{
  int i, j, k;
  for(i=1;i<=5;i++)
  {
    for(j=i;j<5;j++)
    {
      printf(" ");
    }
    for(k=1;k<(i*2);k++)
    {
      printf("%d",k);
    }
    printf("\n");
  }
  for(i=4;i>=1;i--)
  {
    for(j=5;j>i;j--)
    {
      printf(" ");
    }
    for(k=1;k<(i*2);k++)
    {
      printf("%d",k);
    }
    printf("\n");
  }
  return 0;
}

Pattern 21

Program
#include<stdio.h>
int main()
{
  int i, j;
  for(i=1;i<=7;i+=2)
  {
    for(j=1;j<=i;j++)
    {
      printf("%d",j);
    } 
    printf("\n");
  }
  for(i=5;i>=1;i-=2)
  {
    for(j=1;j<=i;j++)
    {
      printf("%d",j);
    }
    printf("\n");
  }
  return 0;
}

Pattern 22

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

Pattern 23

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

Pattern 24

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

Pattern 25

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

Note:

All the programs are compiled and executed in Dev C++ code editor and save with .c extension.

Note:

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