C# program that print charater from A to Z and it's corresponding number
#include <stdio.h>
int main() {
char c;
printf("Enter u to display uppercase alphabets.n");
printf("Enter l to display lowercase alphabets. n");
scanf("%c", &c);
if (c == 'U' || c == 'u') {
for (c = 'A'; c <= 'Z'; ++c)
printf("%c ", c);
} else if (c == 'L' || c == 'l') {
for (c = 'a'; c <= 'z'; ++c)
printf("%c ", c);
} else {
printf("Error! You entered an invalid character.");
}
return 0;
}