---
name: "strtrim"
section: "3pub"
platform: "linux"
package: "publib-dev"
version: "0.40-4"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/strtrim"
---

# strtrim(3pub)

remove leading and trailing whitespace

## NAME

strtrim - remove leading and trailing whitespace

## SYNOPSIS

```
#include <publib.h>
char *strtrim(char *s);
```

## DESCRIPTION

*strtrim* removes all whitespace characters from the beginning and the end of a string.  As whitespace is counted everything for which [*isspace*(3)](/isspace/3.md) returns true.

## RETURN VALUE

*strtrim* returns its argument.

## EXAMPLE

To remove whitespace from the beginning and end of all lines, you might do the following:

```
#include <publib.h>
int main(void) {
	char line[512];
	while (fgets(line, sizeof(line), stdio) != NULL) {
		strtrim(line);
		printf("%s", line);
	}
	return 0;
}
```

## SEE ALSO

publib(3), strrtrim(3), strltrim(3), [isspace(3)](/isspace/3.md)

## AUTHOR

Lars Wirzenius (lars.wirzenius@helsinki.fi)