Conditionals
Programming basics[1]
A conditional statement evaluates an expression and executes instructions depending on the outcome of the evaluation. Conditionals depend on operators to evaluate if an expression is true or false. Conditions and selection are not the same thing. Condition asks a question. A selection processes the answer from that question.
The list below is an example of types of conditional questions:
- Match
- Threshold
- Range
- One-of
- Not-match
- Not one of
- All of
- Some of
- Eligible
An example of a simple conditional in PHP can be found below:
<?php
# this file is used to teach the VERY BASICS of conditions in php
$secret_number = 54;
$player_guess = 54;
if ($player_guess == $secret_number) {
echo "You guessed it!";
} elseif ($player_guess >= $secret_number) {
echo "a bit high...";
} elseif ($player_guess <= $secret_number) {
echo "a bit low...";
}
?>
A video[edit]
This video references the C programming language and scratch, but the ideas about conditionals are excellent. In the case of conditionals, PHP and C share similar syntax (but not exact).
Standards[edit]
- Define the terms: variable, constant, operator, object.