Perl | Useful Math functions

In Perl, sometimes there is a need to solve various expressions that contain some mathematical operations. These mathematical operations can be performed with the use of various inbuilt-functions.

#!/usr/bin/perl  
    
# Initialising some values for the  
# parameter of the exp function  
$A = 0;  
$B = 1;  
  
# Calling the exp function  
$E = exp $A;  
$F = exp $B;  
   
# Getting the value of "e" raised to the  
# power of the given parameter.  
print "$E\n";  
print "$F\n";  
  
# Calculating square root using sqrt()  
$square_root = sqrt(64);  
    
# Printing the result  
print "Squareroot of 64 is: $square_root";  

Some useful functions for mathematical operations in Perl are listed below:

Function	Description
exp()	Calculates “e” raised to the power of the real number taken as the parameter
hex()	Converts the given hexadecimal number ( of base 16 ) into its equivalent decimal number ( of base 10 ).
srand()	Helps rand() function to generate a constant value each time the program is run
sqrt()	Used to calculate the square root of a number
oct()	Converts the octal value passed to its respective decimal value
rand()	Returns a random fractional number between 0 and the positive number value passed to it, or 1 if no value is specified
log()	Returns the natural logarithm of value passed to it. Returns $_ if called without passing a value
int()	Returns the integer part of given value. It returns $_ if no value provided
sin()	Used to calculate sine of a VALUE or $_ if VALUE is omitted
cos()	Used to calculate cosine of a VALUE or $_ if VALUE is omitted
atan2()	Used to calculate arctangent of Y/X in the range -PI to PI.
abs()	Returns the absolute value of its argument

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