C Program to Convert Lowercase String to Uppercase

In this program, we will take an lower case string as input from user and convert that into upper case string.

//C program to convert string from lowercase to upper case 
int main(){
   char str[50];
   int i;
   printf("Enter the string:");
   scanf("%s",str);

   for(i=0;i<=strlen(str);i++){
      if(str[i]>=97&&str[i]<=122)
         str[i]=str[i]-32;
   }
   printf("\nUpper Case String is: %s",str);
   return 0;
}

Output