08/05/2017

14TH DAY AT UKI

ARRAY

   1.  Javascript arrays are used to store multiple values in a single variable.
        Example:
                 var cars=["saab","volvo","BMW"]

   2. We refer to an array element by referring to the index number.
        Example:
                var cars=["saab","volvo","BMW"]
                document.getElementById("demo").innerHTML=cars[0];
       result is saab

3.  Array indexes starts with 0.

 4. Arrays are a special type of objects.

 5. Length property
       The length property returns the number of elements.
          Example:
                var fruits=["banana","orange","apple","mango"];
                fruits.length;
      result is 4 
           


For Loop

    1.Loops are handy, if you want to run the same code over and over again, each time with a different value.

    for(statement1;statement2,statement3)
    {
     code block to be executed
     }

Example:
     for(i=0;i<5;i++)
     {
      text+="The number is"+i+"<br>";
      }
  

2.Statement1
Normally you will use statement 1 to initialize the variable used in the loop (i = 0).
This is not always the case, JavaScript doesn't care. Statement 1 is optional.


3.Statement2
Often statement 2 is used to evaluate the condition of the initial variable.

4.Statement3
Often statement 3 increments the value of the initial variable.
statement3 is optional.