C program to Toggle Case of all Characters in a String

C program to toggle case of all characters in a string; Through this tutorial, we will learn how to toggle case of all or each characters in a string using for loop, while loop, ascii value, and function in c programs.

Programs to Toggle Case of all Characters in a String in C

• C program to Toggle Case of all Characters in a String using For Loop
• C program to Toggle Case of all Characters in a String using While Loop
• C program to Toggle Case of all Characters in a String using Ascii value
• C program to Toggle Case of all Characters in a String using Function

C program to Toggle Case of all Characters in a String using For Loop

/* C program to Toggle Case of all Characters in a String */

#include <stdio.h>
#include <string.h>

int main()
{
  	char Str1[100];
  	int i;

  	printf("\n Please Enter any String to Toggle : ");
  	gets(Str1);

  	for (i = 0; Str1[i]!='\0'; i++)
  	{
  		if(Str1[i] >= 'a' && Str1[i] <= 'z')
  		{
  			Str1[i] = Str1[i] - 32;
		}
  		else if(Str1[i] >= 'A' && Str1[i] <= 'Z')
  		{
  			Str1[i] = Str1[i] + 32;
		}
  	}

  	printf("\n The Given String after Toggling Case of all Characters = %s", Str1);

  	return 0;
}

The output of the above c program; as follows:

Please Enter any String to Toggle : hello
The Given String after Toggling Case of all Characters = HELLO

C program to Toggle Case of all Characters in a String using While Loop

/* C program to Toggle Case of all Characters in a String */

#include <stdio.h>
#include <string.h>

int main()
{
  	char Str1[100];
  	int i;

  	printf("\n Please Enter any String to Toggle :  ");
  	gets(Str1);

  	i = 0;
  	while(Str1[i]!='\0')
  	{
  		if(Str1[i] >= 'a' && Str1[i] <= 'z')
  		{
  			Str1[i] = Str1[i] - 32;
		}
  		else if(Str1[i] >= 'A' && Str1[i] <= 'Z')
  		{
  			Str1[i] = Str1[i] + 32;
		}
		i++;
  	}

  	printf("\n The Given String after Toggling Case of all Characters = %s", Str1);

  	return 0;
}

The output of the above c program; as follows:

Please Enter any String to Toggle :  WORLD
The Given String after Toggling Case of all Characters = world

C program to Toggle Case of all Characters in a String using Ascii value

/* C program to Toggle Case of all Characters in a String */

#include <stdio.h>
#include <string.h>

int main()
{
  	char Str1[100];
  	int i;

  	printf("\n Please Enter any String to Toggle :  ");
  	gets(Str1);

  	for (i = 0; Str1[i]!='\0'; i++)
  	{
  		if(Str1[i] >= 65 && Str1[i] <= 90)
  		{
  			Str1[i] = Str1[i] + 32;
		}
		else if(Str1[i] >= 97 && Str1[i] <= 122)
  		{
  			Str1[i] = Str1[i] - 32;
		}
  	}

  	printf("\n The Given String after Toggling Case of all Characters = %s", Str1);

  	return 0;
}

The output of the above c program; as follows:

Please Enter any String to Toggle :  c programming
The Given String after Toggling Case of all Characters = C PROGRAMMING

C program to Toggle Case of all Characters in a String using Function

/* C program to Toggle Case of all Characters in a String */

#include <stdio.h>

void String_Toggle(char []);

int main()
{
	char str[100];

	printf("\n Please Enter any String to Toggle :  ");
	gets(str);

	String_Toggle(str);

	printf("\n The Given String after Toggling Case of all Characters = %s", str);

	return 0;
}

void String_Toggle(char Str1[])
{
	int i;

	for (i = 0; Str1[i]!='\0'; i++)
  	{
  		if(Str1[i] >= 65 && Str1[i] <= 90)
  		{
  			Str1[i] = Str1[i] + 32;
		}
		else if(Str1[i] >= 97 && Str1[i] <= 122)
  		{
  			Str1[i] = Str1[i] - 32;
		}
  	}
}

The output of the above c program; as follows:

Please Enter any String to Toggle :  functions
The Given String after Toggling Case of all Characters = FUNCTIONS

Recommended C Programs