C Program to display the numbers in X pattern

Refer an algorithm given below for the C program to display the numbers in X pattern.

Algorithm

Step 1: Start
Step 2: Declare variables
Step 3: Read number of rows
Step 4: for loop satisfies
if(i==j || i+j==rows-1)
print i+1
Print " "
Step 5: Print new line
Step 6: Stop

The logic to print numbers in X pattern is as follows −

for(i=0;i<rows;i++){
   for(j=0;j<rows;j++){
      if(i==j || i+j==rows-1){
         printf("%d",i+1);
      }else{
         printf(" ");
      }
   }
   printf("\n");
}

Program

Following is the C program to display the numbers in X pattern −

#include<stdio.h>
main(){
   int i,j,rows;
   printf("Enter number of rows:\n");
   scanf("%d",&rows);
   for(i=0;i<rows;i++){
      for(j=0;j<rows;j++){
         if(i==j || i+j==rows-1){
            printf("%d",i+1);
         }else{
            printf(" ");
         }
      }
      printf("\n");
   }
}

Output

When the above program is executed, it produces the following result −

Enter number  of rows:10
1           1
  2        2
    3    3
      4 4
       55
       66
      7 7
    8     8
  9        9
10          10