Write a program to print a number pattern in C

Program Description

Number patterns are sequences of numbers created according to rules called pattern rules. Pattern rules can use one or more mathematical operations to describe the relationship between consecutive numbers in a sequence.

Pattern Example

Pattern 1

1
2 6
3 7 10
4 8 11 13
5 9 12 14 15

Pattern 2

        1
      1 2 3
    1 2 3 4 5
  1 2 3 4 5 6 7
1 2 3 4 5 6 7 8 9
  1 2 3 4 5 6 7
    1 2 3 4 5
      1 2 3
        1

Algorithm

<strong>Pattern 1:</strong>
i stands for rows and j stands for columns.
5 stands for making pattern for 5 Rows and Columns
Loop for each Row (i)
K is initialized to i
Loop for each Column (j)
Do the Pattern for the current Column (j)
Display the Value of K
Reinitialize the Value of K = k + 5 - j
<strong>Pattern 2:</strong>
First Row: Display 1
Second Row: Display 1,2,3
Third Row: Display 1,2,3,4,5
Fourth Row: Display 1,2,3,4,5,6,7
Fifth Row: Display 1,2,3,4,5,6,7,8,9
Display the same contents from 4th Row till First Row below the fifth Row.

Example

/* Program to print Numeric Pattern */
#include<stdio.h>
int main(){
   int i,j,k;
   printf("Numeric Pattern 1");
   printf("</p><p>");
   printf("</p><p>");
   for(i=1;i<=5;i++){
      k = i;
      for(j=1;j<=i;j++){
         printf("%d ", k);
         k += 5-j;
      }
      printf("</p><p>");
   }
   printf("</p><p>");
   printf("Numeric Pattern 2");
   printf("</p><p>");
   printf("</p><p>");
   for(i = 1;i<=5;i++){
      for(j = i;j<5;j++){
         printf(" ");
      }
      for(k = 1;k<(i*2);k++){
         printf("%d",k);
      }
      printf("</p><p>");
   }
   for(i = 4;i>=1;i--){
      for(j = 5;j>i;j--){
         printf(" ");
      }
      for(k = 1;k<(i*2);k++){
         printf("%d",k);
      }
      printf("</p><p>");
   }
   getch();
   return 0;
}

Output

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