March 2018 20 Arrays

While loop:

while (true) {}

Dead Loop:

while (true) {}

for (;;) {}

End Dead Loop:

while (true) {

if () {break; }

}

Examples of dead loops:

var aaa= ""  while (true) {       sea = prompt ("called Papa");       if (sea = = = "Papa") {break          ;   }}

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Array:

Defining assignments using traversal

Array elements: Each item in an array

Array Length: The number of elements in the array (array name. length)

Array subscript (Index): The position of the array element in the array starts at 0

The array's subscript is the 0 element that is the first element of the array

Traversing for for

Common methods of arrays:

Push (); append one element at the end

Unshift (); Append an element in front of

Pop (); Delete last element

Shift (); Delete the first element

Iindexof (): Find the first occurrence of the position returned subscript not found return-1

LastindexOf (): Find the last occurrence of the position returned subscript not found return-1

Examples of arrays:

//Q: Admin Add user Information  Select how many each of the Var aa=[];//is  used to store user information Var  bb= prompt ("How many Users");//fill in the number of user information var  cc= "";// User information, for (var i=0; I<BB; i++) {     = prompt ("user" + (i+1) + "Information");     = cc ;  }alert (AA);

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March 2018 20 Arrays