The **`abs()` function** returns the absolute value of a number. 

Figure 1 shows the mathematical representation of the `abs()` function.

# Syntax
```perl
abs(num)
```
> `num` is the number whose absolute value is required
# Parameter
The `abs()` function takes a number as a parameter. 

# Return value
The `abs()` function returns the *absolute value* of a number passed as a parameter.  

> If a `string` is passed to this function it returns `0`.
# Code





#positive number 
print "The value of abs(10) : ".abs(10). "\n";

#zero 
print "The value of abs(0) : ".abs(0). "\n";

#negative number 
print "The value of abs(-10) : ".abs(-10). "\n";

#string
print "The value of abs(str) : ".abs("str"). "\n";

What is abs() in Perl?

Returns the absolute value of a number in Perl, outputs 0 for strings.