C Program to convert upper case characters to lower case and vice versa

#CProgramforLowerCasetoUpperCaseandviceversa #Replacelowercasecharactersbyuppercaseandviceversa #Howto ConvertCharacterFromLowercasetoUppercaseinC

In this video, how to Convert upper case letter into lower case letter and lower case letter into upper case in String in C programming is explained with the help of practical demonstration.

[PranathiBendalam]

This is OK but we need complete small letters as output from the mix of upper and lower case letters..plz reply me sir

[saibharathpatibandla]

Sir 97 is greater than 65 then why the first condition in first loop is false

[akan]

can you run my program and tell me...why is it not giving me correct output????

//program check lowercase and uppercase letter
#include <stdio.h>
#include <ctype.h>
#define size 50
void main()
{ char str[size];//DECLARING ARRAY
printf("enter string\n"); //INPUT
scanf("%s", str);
printf("\n your input=%s\n", str);
if(islower(str[size]))
printf("%s is lowercase letter\n", str);
else if(isupper(str[size]))
printf("%s is uppercase letter\n", str);




}

[supratim]

Upper and lower cases letter are same?

[sudiptadebnathsskd]

A tribute :)
#include<stdio.h>
#include<string.h>

int main()
{
char s[50];
int i;

printf("Enter Characters: ");
gets(s);

for(i = 0; s[i] != '\0'; i++)
{
if(s[i] >= 65 && s[i] <= 90)
s[i] = s[i] + 32;
else if(s[i] >= 97 && s[i] <= 122)
s[i] = s[i] - 32;
}

printf("Modified String: %s\n", s);

return 0;
}