Covert Lowercase characters to Uppercase Characters

Description

Get a String and convert the lower case characters to upper case Characters
Input:
Hello
Output:
HELLO

Solution

#include<stdio.h>
int main()
{
	char str[50];
	int i = 0;
	fgets(str,50,stdin);
	while(str[i]!='\0')
	{
		if(str[i]>=97 && str[i]<=122)
		{
			str[i]=str[i]-32;
		}
		i++;
	}
	printf("%s",str);
	return 0;
}

	

Explanation

Get a String using fgets() function. 
Str -> reads the string and stores it in str.
50 -> reads maximum of 50 characters
stdin-> reads character from keyboard

ASCII value of A to Z is 65 - 90 and a to z is 97 to 122.

for loop iterates and check each character whether it is  s a to z, if it is in a to z then decrement it with 32 to get Upper Case.