C program to convert lower case into upper case and vice versa

Example C program to convert lower case into upper case and vice versa:

Below C program is used to convert lower case into upper case. strupr() function is a non standard function. So, all compilers may not support.

Output:

MODIFY THIS STRING TO UPPER


Below C program is used to convert upper case into lower case. strlwr() function is also a non standard function. So, all compilers may not support.

Output:

modify this string to lower

 


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