Numbers and Math in Ruby

Ruby Math Module

The Ruby Math module provides a wide number of ways for doing mathematical tasks to Ruby programmers. Furthermore, the Math module contains two often-used mathematical constants.

There are several math symbols. Let us name them right now, so you know what they are. Say the name as you enter it. You can stop speaking to them when they get tedious. The following are their names:

• + plus
• - minus
• / slash
• * asterisk
• % percent
• < less-than
• > greater-than
• <= less-than-equal
• >= greater-than-equal

Constant in Numbers and Math

Common math constants are included in the Ruby Math module. The constants method provides access to a list of constants:

1. PI
2. E

As we can see, only two constants are declared in the present version of Ruby. We can get to them by using the notation:

Math::PI

=> 3.14159265358979

Math::E

=> 2.71828182845905

Ruby Math and Numbers Methods

Module functions for fundamental trigonometric and transcendental functions are available in the Math module. A collection of constants defining Ruby's floating point precision may be found in the class Float.

Ruby offers a wide number of math-related methods. The following lists describe them:

acos(x) → float

The arc cosine of x is computed. 0..PI is returned.
 

acosh(x) → float

The inverse hyperbolic cosine of x is computed.
 

asin(x) → float

The arc sine of x is computed. Returns -PI/2...PI/2.
 

asinh(x) → float

The inverse hyperbolic sine of x is computed.
 

atan(x) → floatclick to toggle 

The arc tangent of x is computed. Returns -PI/2...PI/2.
 

atan2(y, x) → float

Given y and x, this function computes the arc tangent. -PI...PI is returned.
 

atanh(x) → float

The inverse hyperbolic tangent of x is computed.
 

cbrt(numeric) → float

The cube root of numeric is returned.
 

cos(x) → floatclick to toggle source

This function computes the cosine of x. (expressed in radians). -1..1 is returned.
 

cosh(x) → float

This function computes the hyperbolic cosine of x. (expressed in radians).
 

erf(x) → float

The error function of x is calculated.
 

erfc(x) → float

This function computes the complementary error function of x.
 

exp(x) → float

returns e**x
 

frexp(numeric) → [ fraction, exponent ]

Returns a two-element array with the numeric's normalized fraction (a Float) and exponent (a Fixnum).
 

gamma(x) → floatclick to toggle source

The gamma function of x is computed.

For integer n > 0, gamma(n) is equal to fact(n-1). However, gamma(n) returns a float and can be used as a rough estimate.
 

hypot(x, y) → float

Returns the hypotenuse of a right-angled triangle with sides x and y, sqrt(x**2 + y**2).
 

ldexp(flt, int) → float

The value of flt*(2**int) is returned.
 

lgamma(x) → [float, -1 or 1]

Calculates the logarithmic gamma of x as well as its sign.
 

log(numeric) → float

log(num,base) → float

The natural logarithm of numeric is returned. If a second argument is provided, it will be the base of the logarithm.
 

sin(x) → float

This function computes the sine of x. (expressed in radians). -1..1 is returned.
 

sinh(x) → float

This function computes the hyperbolic sine of x. (expressed in radians).
 

sqrt(numeric) → floatclick to toggle source

The non-negative square root of numeric is returned.
 

tan(x) → float

The tangent of x is returned (expressed in radians).
 

tanh() → float

computes x's hyperbolic tangent (expressed in radians).

Data in the Tabular form

Let's Understand it better with some examples:-

To perform a square root:

Math.sqrt(9)

=> 3.0

To perform a Euler calculation:

Math.exp(2)

=> 7.38905609893065

To perform Addition, Subtraction, Multiplication, and Division

Puts 3+2+1-5+4%2 - 1/4+ 6

=>7

Frequently Based Questions

Why is the percent character called a "modulus" rather than a "percent"?

Most of the time, that's just how the designers opted to utilize the symbol. In regular writing, you would read it as a "percentage." This computation is commonly performed in programming using basic division and the / operator. The percent modulus is a distinct operation that occurs to employ the percent sign.

How does % work?

"X divided by Y with J remaining" is another way to put it. "100 divided by 16 with four remaining," for example. The J part, or the remaining part, is the result of percent.

What is the Constant of Numbers and Math in Ruby?

Common math constants are included in the Ruby Math module. The constants method provides access to a list of constants PI and E.

What are Methods in Numbers and Math in Ruby?

Module functions for fundamental trigonometric and transcendental functions are available in the Math module.

Ruby offers a wide number of math-related methods.

What is the use of Math.atan, Math.atan!, Math.atan2, Math.atan2! Method?

Math.atan, Math.atan!, Math.atan2, Math.atan2! This method is basically used to determine Arc tangent. atan takes an x argument. atan2 takes x and y arguments

Conclusion 

In this article, we learned about Numbers and Math in Ruby, which includes Modules, Constants and Methods of Numbers and Math in Ruby.

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