Change ‘upper’ to ‘lower’ case & ‘lower’ to ‘upper’ case in C language..

Some important symbols used in code.

• () small bracket
• && use for ‘and’ use for address
• {} curly bracket
• “” double code

Print capital letter..

1. #include<stdio.h>
2. #include<conio.h>
3. void main()
4. {
5. char ch;
6. int a, b, c;
7. clrscr();
8. printf(“print upper case ‘A to Z‘ \n”);
9. for(a=65;a<=90;a++)
10. {
11. printf(“%c”, a);
12. }
13. getch();
14. }

Results..

print small letter….

1. #include<stdio.h>
2. #include<conio.h>
3. void main()
4. {
5. char ch;
6. int a, b, c;
7. clrscr();
8. printf(“print ‘lower’ case ‘A to Z‘ \n”);
9. for(a=97;a<=122;a++)
10. {
11. printf(“%c”, a);
12. }
13. getch();
14. }

Results..

Print ‘capital’ & ‘small’ letter using ‘for’ loop..

1. #include<stdio.h>
2. #include<conio.h>
3. void main()
4. {
5. char ch;
6. int a, b, c;
7. clrscr();
8. printf(“print upper case ‘A to Z‘ \n”);
9. for(a=65;a<=90;a++)
10. {
11. printf(“%c”, a);
12. }
13. printf(“/n print lower case ‘a to z’ \n”);
14. for(b=97;b<=122;b++)
15. {
16. printf(” %c”, b);
17. }
18. getch();
19. }

Results..

Print ‘capital’ & ‘small’ letter using ‘while’ loop..

1. #include<stdio.h>
2. #include<conio.h>
3. void main()
4. {
5. char ch;
6. int a, b, c;
7. clrscr();
8. printf(“print upper case ‘A to Z‘ \n”);
9. a=65;
10. while(a<=90)
11. {
12. printf(“%c”, a);
13. a++;
14. }
15. printf(“/n print lower case ‘a to z’ \n”);
16. b=97;
17. while(b<=122)
18. {
19. printf(” %c”, b);
20. b++;
21. }
22. getch();
23. }

Print ‘capital’ & ‘small’ letter using ‘do while’ loop..

1. #include<stdio.h>
2. #include<conio.h>
3. void main()
4. {
5. char ch;
6. int a, b, c;
7. clrscr();
8. printf(“print upper case ‘A to Z‘ \n”);
9. a=65;
10. do
11. {
12. printf(“%c”, a);
13. a++;
14. }
15. while(a<=90);
16. printf(“/n print lower case ‘a to z’ \n”);
17. b=97;
18. do
19. {
20. printf(” %c”, b);
21. b++;
22. }
23. while(b<=122);
24. getch();
25. }

Results..

Given above…