Example 3: Half Pyramid of Alphabets

A
B B
C C C
D D D D
E E E E E

C Program

#include 
int main() {
   int i, j;
   char input, alphabet = 'A';
   printf("Enter an uppercase character you want to print in the last row: ");
   scanf("%c", &input);
   for (i = 1; i <= (input - 'A' + 1); ++i) {
      for (j = 1; j <= i; ++j) {
         printf("%c ", alphabet);
      }
      ++alphabet;
      printf("\n");
   }
   return 0;
}