Write a C Program to Convert lowercase to uppercase and vice versa

By | November 9, 2016

Convert lowercase to uppercase and vice versa


Write a C Program to Convert lowercase to uppercase and vice versa. Here’s simple C Program to Convert lowercase to uppercase and vice versa 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 Convert lowercase to uppercase and vice versa. The C program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.


SOURCE CODE : :



OUTPUT : :



Above is the source code for C Program to Convert lowercase to uppercase and vice versa which is successfully compiled and run on Windows System.The Output of the program is shown above .

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