isprint() in C
Last Updated :
07 Aug, 2023
The C isprint() function is used to check if a character passed as the argument is a printable character or not. isprint() is defined in the <ctype.h> standard library header file.
Printable characters in C are:
- digits ( 0123456789 )
- uppercase letters ( ABCDEFGHIJKLMNOPQRSTUVWXYZ )
- lowercase letters ( abcdefghijklmnopqrstuvwxyz )
- punctuation characters ( !”#$%&'()*+,-./:;?@[\]^_`{ | }~ )
- space ( )
Note: The isprint() function checks the ASCII value of a character to determine whether it is a printable character or not.
Syntax of isprint()
int isprint (int c);
Parameters
- c: It is the character to be checked.
Return Value
- It returns a non-zero value(true) if the given character is printable.
- If the character is not printable, it returns zero (false).
Complexity Analysis
- Time Complexity: O(1)
- Auxiliary Space: O(1)
Example of isprint()
The below C program calculates the number of printable characters in the string.
Algorithm
- Traverse the given string character by character up to its length, and check if the character is a printable character using isprint() function.
- If it is a printable character, increment the counter by 1, else traverse to the next character.
- Print the value of the counter.
Sample Input : string = ‘My name \n is \n Ayush’
Sample Output : 18
Implementation
Output
My name is Ayush
18
Like Article
Suggest improvement
Share your thoughts in the comments
Please Login to comment...