CoffeeScript Math - log()

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Description

The log() method accepts a number and returns its the natural logarithm (base E) of a number. If the value of number is negative, the return value is always NaN.

Syntax

Given below is the syntax of log() method of JavaScript. We can use the same method in the CoffeeScript code.

Math.log ( x )

Example

The following example demonstrates the usage of the log() method in CoffeeScript. Save this code in a file with name math_log.coffee.

value = Math.log 10
console.log "The log value of 10 is : " + value 
         
value = Math.log 0
console.log "The log value of 0 is : " + value 
         
value = Math.log 100
console.log "The log value of 100 is : " + value 

Open the command prompt and compile the .coffee file as shown below.

c:\> coffee -c math_log.coffee

On compiling, it gives you the following JavaScript.

// Generated by CoffeeScript 1.10.0
(function() {
  var value;

  value = Math.log(10);

  console.log("The log value of 10 is : " + value);

  value = Math.log(0);

  console.log("The log value of 0 is : " + value);

  value = Math.log(100);

  console.log("The log value of 100 is : " + value);

}).call(this);

Now, open the command prompt again, and run the CoffeeScript file as shown below.

c:\> coffee math_log.coffee

On executing, the CoffeeScript file produces the following output.

The log value of 10 is : 2.302585092994046
The log value of 0 is : -Infinity
The log value of 100 is : 4.605170185988092