Program

#include<stdio.h>

int main()
{
	//counter, it can also be declared as 'char'
	int count;
	//initializing counter by 'A'
	count= 'A';
	//definig label
	start:
	printf("%c [%d] ",count,count);
	count++;
	//jumping back to 'stat' if condition is true
	if(count <= 'Z')
		goto start;
	return 0;
}

Output

A [65] B [66] C [67] D [68] E [69] F [70] G [71] H [72] 
I [73] J [74] K [75] L [76] M [77] N [78] O [79] P [80] 
Q [81] R [82] S [83] T [84] U [85] V [86] W [87] X [88] 
Y [89] Z [90] 

This is a way, by which we can print ASCII values of all uppercase characters (alphabets), please write through comment, if you have any doubt?