Ex: Write a C program to print diamond number pattern. How to write a C program to print diamond number pattern. C program to print diamond number pattern.
Input from user:
Enter the number: 5
Expected output:
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1
Step by step logic of the given:
For better understanding i have devided this code in two parts.
To print upper half part:
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1. Accept input number from user.
2. Run outer for loop from 1 to no which shows rows in pattern:
for(i=1;i<=no;i++)
3. Run inner for loop from i to no-1 to print spaces:
for(j=i;j<no;j++)
{
printf(" ");
}
4. Run another inner for loop from 1 to i which shows columns in pattern:
for(k=1;k<=i;k++)
5. Inside the second inner for loop print value of k with one space:
printf("%d ",k);
6. After that outside the block of inner for loop print next line \n for print new row.
To print lower half part:
1 2 3 4
1 2 3
1 2
1
1. Run outer loop from 1 to no-1 which shows rows in pattern:
for(i=1;i<no;i++)
2. Run inner for loop from 1 to i to print spaces:
for(j=1;j<=i;j++)
{
printf(" ");
}
3. Run another one inner for loop from 1 to no-i and inside the loop print value of k :
for(k=1;k<=no-i;k++)
{
printf("%d ",k);
}
4. Last print \n for new row.
Program to print diamond number pattern:
#include<stdio.h>
void main()
{
int no,i,j,k;
printf("Enter the number:");
scanf("%d",&no);
/*To print upper part*/
for(i=1;i<=no;i++)
{
for(j=i;j<no;j++)
{
printf(" ");
}
for(k=1;k<=i;k++)
{
printf("%d ",k);
}
/*For next row*/ printf("\n");
}
/*To print lower part*/
for(i=1;i<no;i++)
{
for(j=1;j<=i;j++)
{
printf(" ");
}
for(k=1;k<=no-i;k++)
{
printf("%d ",k);
}
/*For next row*/
printf("\n");
}
}
Above program shows the following output:
