C program to check whether the given string is pangram or not

Pangram :- If a string contains every letter of the English alphabet i.e all 26 alphabets then the string is known as Pangram.

For Example :-

String1 = The quick brown fox jumps over the lazy dog

So as we can see that the given strings contains all letters of English alphabet therefore the string is Pangram.

#include<stdio.h>
#include<conio.h>
void main()
{
	char str[100]="The quick brown fox jumps over the lazy dog";
	int i,value[26]={0},count=0;
	for(i=0;str[i]!='\0';i++)
	{
		if('a'<=str[i] && str[i]<='z')
		{
			count+=!value[str[i]-'a'];
			value[str[i]-'a']=1;
		}
		else if('A'<=str[i] && str[i]<='Z')
		{
			count+=!value[str[i]-'A'];
			value[str[i]-'A']=1;
		}
	}
	if(count==26)
	{
		printf("The String is a Pangram String.");
	}
	else
	{
		printf("The String is not a Pangram String.");
	}
	getch();
}

The String is a Pangram String.