Prev Next
isgraph() function in C:
- isgraph( ) function in C language checks whether given character is graphical character or not. Syntax for isgraph( ) function is given below.
int isgraph( int x );
- All printable characters are graphical characters except space ( ‘ ‘ ).
Example program for isgraph() function in C:
- In this program, isgraph( ) function checks whether character is graphical character or not.
- If its a graphical character, it is printed in output. Else, control is coming out of while loop. Output is printed as “fresh” since space (” “) is not a graphical character and it can’t be printed in output.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
#include <stdio.h> int main() { char string[50] ="fresh 2 refresh \n string"; int i = 0; while(1) { if(isgraph(string[i])) { putchar(string[i]); i++; } else break; } return 0; } |
Output:
| fresh |
Other Int, Char validation functions in C programming language:
- All “int, char validation functions” used in C programming language are given below. “ctype.h” header file support all these functions in C language.
- Click on each function name below for detail description and example programs.
| Functions | Description |
| isalpha() | checks whether character is alphabetic |
| isdigit() | checks whether character is digit |
| isalnum() | Checks whether character is alphanumeric |
| isspace() | Checks whether character is space |
| islower() | Checks whether character is lower case |
| isupper() | Checks whether character is upper case |
| isxdigit() | Checks whether character is hexadecimal |
| iscntrl() | Checks whether character is a control character |
| isprint() | Checks whether character is a printable character |
| ispunct() | Checks whether character is a punctuation |
| isgraph() | Checks whether character is a graphical character |
| tolower() | Checks whether character is alphabetic & converts to lower case |
| toupper() | Checks whether character is alphabetic & converts to upper case |