Client side programming

Exercise #1

method/property	description
name.length	The number of characters in the string. (12)
name.charAt(0)	Extracts the character at a given index/position ("J")
name.indexOf(" ")	Searches the string for a character or string. Returns it's index (5)
name.slice(6)	Returns a slice or substring of a string ("Rocker")
name.split(" ")	Splits a string into an array, using a delimiter ( ["Jolly, "Rocker"] )
name.toLowerCase()	Returns a copy of the string in lower case ("jolly rocker")
name.toUpperCase()	Returns a copy of the string in upper case ("JOLLY ROCKER")

assuming you have:

var name = "Jolly Rocker"

var name = "Alexander"
var part = name.slice(4,7) // and

 Alexander

012345678

var name = "Alexander"
var part = name.slice(3) // xander

 Alexander

012345678

if the end-parameter is missing, it slices to the end of the string

between any two numbers

var min  = -15;  // ANY number you want
var max  = 10; // a higher number than min.

var random = Math.floor(Math.random() * (max-min+1)+min);

var random = Math.round( Math.random() );

the character at position...

var vowels = "aeiouy"
//            012345

var letterU = vowels.charAt(4)

By Johan Kohlin

Conditionals and Loops exercise

Lecturer at School of engineering, Jönköping University.