Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
|
5 variable types
|
Integer
Boolean String Date Object |
|
|
wiring up
|
associating an event with an event handler
|
|
|
immutable
|
cannot be changed (as in variable name and type)
|
|
|
concatenation operator
|
& same as in asp
|
|
|
variablename+=value
|
same as
variablename = variablename + value |
|
|
5 shorthand arithmetic operators
|
+=
-= *= /= &= |
|
|
strongly types
|
variables cannot change type on the fly
|
|
|
casting
|
process of changing variable from one type to another
|
|
|
explicit casting
2 ways to do it |
when developer explicitly indicates that type should be changed
Ctype(variable, typetocastto) or using convert class Convert.To... |
|
|
2 vb.net modes
|
strict - implicit casting only allowed for widening casts (1 to 1.0, integer to float)
nonstrict - non-widening cast (3.14 to 3, float to integer) |
|
|
8/4=?
|
2.0!
|
|
|
Dim x as integer
x = 8/4 is an example of? |
an implicit narrowing cast
|
|
|
how do you disable implict narrowing cast?
|
in the page directive by setting STRICT = TRUE
|
