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Function Details : iscntrl

intiscntrl(int c) ;

Return Type : int

Integer type (typically 4 bytes, -2,147,483,648 to 2,147,483,647)

Read about return values of iscntrl function .

1st Parameter Type : int

Integer type (typically 4 bytes, -2,147,483,648 to 2,147,483,647)

1st Parameter

The character to be tested, passed as an `unsigned char` cast to an `int`, or `EOF`

Read more about parameters of iscntrl in parameters section

The iscntrlfunction in C language Checks whether the character is a control character.

The iscntrl function tests whether c is a control character. Control characters are those between 0 and 31 in the ASCII table, plus the DEL character (127).

The iscntrlfunction takes 1 parameter:

•
int `c`: The character to be tested, passed as an `unsigned char` cast to an `int`, or `EOF`

Checks if the given character `c` is a control character. Control characters include non-printable characters such as newline (`\n`), tab (`\t`), and others in the ASCII range 0–31 and 127. Returns a nonzero value if `c` is a control character, and `0` otherwise.

The iscntrl function return value :

Returns non-zero if the character is a control character, 0 otherwise

Output

This example demonstrates basic usage of iscntrl with various characters, including control characters.