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This one, Sheed
Term | Definition |
---|---|
Boolean | A...is a true or false value |
Float | Numbers with or without decimals |
Integer | A whole number (not a fraction) |
String | A sequence of characters |
Variable | A symbol or container that holds a value |
Increment | To add or increase |
Decrement | To subtract from or decrease |
Constant | A variable in a program that has a value that does not change. |
Coordinate | A ... system uses numbers as coordinates to place objects in a geometric space. |
Canvas | The screen on which graphics programs are drawn. |
Variable name rules (app.) | Must begin with letter or underscore |
Explain global variables vs local variables (app.) | Local variables at defined in functions. Global variables are defined outside the function or with an assignment. |
Is JavaScript case sensitive? | YAAAAS |
Logical operator AND | && |
Logical operator OR | || |
Logical Operator NOT | ! |
Comparison operators | X===y |
For statement (syntax) | For (var = statement ; var <= endval; var = var + increment); for (i =0 ; i <5; i++) |
Random (app.) | Returns a ... number between 0 and 1 |
isNan (app) | Returns true if the given number is not a number, else returns false |
Classes | ...a template to create many objects with similar qualities. |
Concatenation | "String1" + "String2" |
to Uppercase, to Lowercase (applications) | Changes the cases of all the alphabetical letters in the strings |
Switch (app) | A switch checks a value against a list of cases and executes the first case that is true. It goes on executing all other cases it finds after the first true case until it finds a breaking statement |
Variable assignment (ex) | var x = 1 var hisName = "Bob"; var hisName = myName; |
Accessing array elements (app): | You can get elements out of arrays if you know their index. Remember that indexes start at 0 and increment by 1 |
Multi-dimensional Array | Contains two or more arrays within an array |
Dot notation (ex) | ObjectName.PropertyName |
Bracket notation ex. | ObjectName["Property Name"] |