A JavaScript for loop executes a block of statements until a specified condition is true.

An Array is used to store a number of values (called as elements) in order with a single variable.

The sort() method is used to sort the elements of an array.

The substr() method returns the characters in a string starting at a specified position and continuing for a specified number of characters.

The parseInt is used to get a numeric value from a string. parseInt is a top-level function and is not associated with any object.

A script is an executable list of commands like macro or batch file created by a scripting language.

The max() method of math object is used to get the larger of two given numbers.

The abs() method of math object is used to get the absolute value of a number.

In JavaScript the while loop is simple, it executes its statements repeatedly as long as the condition is true. The condition is checked every time at the beginning of the loop.

The global property of the RegExp object specifies whether the g flag is used with the regular expression or not. If used, the regular expression is tested against all possible matches in a string. The value of the global is true if the "g" flag is used; otherwise false.