C program to Toggle each characters in a string

By | 10.11.2016

Toggle each characters in a string

Write a C program to Toggle each characters in a string. Here’s simple C program to Toggle each characters in a string in C Programming Language.

C – Strings : 

Strings are actually one-dimensional array of characters terminated by a null character ‘\0’. Thus a null-terminated string contains the characters that comprise the string followed by a null.

String is a sequence of characters. char data type is used to represent one single character in C. So if you want to use a string in your program then you can use an array of characters.

The declaration and definition of the string using an array of chars is similar to declaration and definition of an array of any other data type.

Any string ends with a terminating null character ‘\0’. An array definition in such a way should include null character ‘\0’ as the last element.

Here is source code of the C program to Toggle each characters in a string. The C program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.


/*  C program to Toggle each characters in a string  */

#include <stdio.h>

int main()
    char    str[100];
    int     counter;

    printf("\nEnter a string: ");

    // toggle each string characters
        if(str[counter]>='A' && str[counter]<='Z')
            str[counter]=str[counter]+32;   //convert into lower case
        else if(str[counter]>='a' && str[counter]<='z')
            str[counter]=str[counter]-32;   //convert into upper case

    printf("\nString after toggle each characters: [ %s ]\n",str);
    return 0;


/*  C program to Toggle each characters in a string  */

Enter a string: Hello CodezClub

String after toggle each characters: [ hELLO cODEZcLUB ]

Process returned 0

Above is the source code for C program to Toggle each character in a string which is successfully compiled and run on Windows System.The Output of the program is shown above .

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About Tunde A

My name is Tunde Ajetomobi, a Tech Enthusiast and Growth Hacker. I enjoy creating helpful content that solves problem across different topics. Codezclub is my way of helping young aspiring programmers and students to hone their skills and find solutions on fundamental programming languages.

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