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/**
* C program to print reverse pyramid star pattern
* atnyla.com
*/
#include"stdio.h"
int main()
{
int i, j, rows;
/* Input rows to print from user */
printf("Enter number of rows : ");
scanf("%d", &rows);
for(i=1; i <= rows; i++)
{
/* Print leading spaces */
for(j=1; j < i; j++)
{
printf(" ");
}
/* Print stars */
for(j=1; j <= (rows*2 -(2*i-1)); j++)
{
printf("*");
}
/* Move to next line */
printf("\n");
}
return 0;
}
Enter number of rows: 5
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*
Basic C programming,?For loop,?Nested loop
?
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?
The above pattern has?N?(in this case 5) rows. Each row has exactly?N * 2 - (i * 2 - 1)?stars. In addition the pattern consists of leading spaces. For each row it contain?i - 1?leading space (where?i?is current row number).
Step by step descriptive logic to print reverse pyramid star pattern.
for(i=1; i <= rows; i++).i - 1. The loop structure should look like?for(j=1; j < i; j++). Inside this loop print single space.rows * 2 - (i * 2 - 1) . The loop structure should look like?for(j=1; j <= (rows*2 - (i*2-1)); j++). Inside this loop print star./** * C program to print reverse pyramid star pattern * atnyla.com */ #include using namespace std; int main() { int i, j, rows; /* Input rows to print from user */ cout << "Enter number of rows " ; cin >> rows ; for(i=1; i <= rows; i++) { /* Print leading spaces */ for(j=1; j < i; j++) { cout << " " ; } /* Print stars */ for(j=1; j <= (rows*2 -(2*i-1)); j++) { cout << "*" ; } /* Move to next line */ cout << "\n" ; } return 0; }
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.