Header File: #include <stdio.h> is
needed to use printf() for printing output.
Main Function: The program starts from
int main(). It returns 0 to indicate successful completion.
Outer Loop (Rows): The outer for loop (i = 5 to i >= 1) controls the number of rows. Each row contains the row number printed multiple times.
Inner Loop (Columns): The inner for loop
(j = 5 to j >= i) prints the current row number i. As i decreases, the number of times i is printed increases.
New Line: printf("\n"); moves the output to
a new line after printing each row.