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log() is a function in JavaScript which is used to print any kind of variables defined before in it or to just print any message that needs to be displayed to the user. Syntax: console. log(A); Parameters: It accepts a parameter which can be an array, an object or any message.

## How do you do logs in JavaScript?

If you need a logarithm to base 2 or 10, use Math. log2() or Math. log10() . If you need a logarithm to other bases, use Math.

The power to which a base of 10 must be raised to obtain a number is called the common logarithm (log) of the number. The power to which the base e (e = 2.718281828…….)

CALCULATIONS INVOLVING LOGARITHMS.

Common Logarithm Natural Logarithm
log x/y = log x – log y ln x/y = ln x – ln y
log xy = y log x ln xy = y ln x

## What are the log rules?

The rules apply for any logarithm logbx, except that you have to replace any occurence of e with the new base b. The natural log was defined by equations (1) and (2).

Basic rules for logarithms.

Rule or special case Formula
Quotient ln(x/y)=ln(x)−ln(y)
Log of power ln(xy)=yln(x)
Log of e ln(e)=1
Log of one ln(1)=0
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## How are logarithms used in real life?

Much of the power of logarithms is their usefulness in solving exponential equations. Some examples of this include sound (decibel measures), earthquakes (Richter scale), the brightness of stars, and chemistry (pH balance, a measure of acidity and alkalinity).

## What is log method?

log() method returns the natural logarithm (base e) of a double value as a parameter. There are various cases : If the argument is NaN or less than zero, then the result is NaN. If the argument is positive infinity, then the result is positive infinity.

## Why ![] Is false?

![] evaluates to false because the reference is truthy. [] can be converted to an number (0 in this case) which is falsey. Therefore: the condition passes as equal.