C Program to read an English sentence and replace lowercase characters by uppercase and vice-versa.

Write a C program to read an English sentence and replace lowercase characters by uppercase and vice-verso. Output the given sentence as well as the case converted sentence on two different lines. Read more about C Programming Language .

* You can use all the programs on www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact info@c-program-example.com
* To find more C programs, do visit www.c-program-example.com
* and browse!
* Happy Coding

#include <stdio.h>
#include <ctype.h>
#include <conio.h>

void main()
char sentence[100];
int count, ch, i;


printf("Enter a sentencen");
for(i=0; (sentence[i] = getchar())!='n'; i++)


count = i; /*shows the number of chars accepted in a sentence*/

printf("The given sentence is : %s",sentence);

printf("nCase changed sentence is: ");
for(i=0; i < count; i++)
ch = islower(sentence[i]) ? toupper(sentence[i]) : tolower(sentence[i]);

} /*End of main()*/
Read more Similar C Programs

C Strings

Data Structures

C Sorting

You can easily select the code by double clicking on the code area above.

To get regular updates on new C programs, you can Follow @c_program

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Share this program with your Facebook friends now! by liking it

(you can send this program to your friend using this button)

Like to get updates right inside your feed reader? Grab our feed!

(c) www.c-program-example.com

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>