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PHP Unit 3
Control structures
| Question | Answer |
|---|---|
| how long a variable is available in memory | Scope |
| variable declared outside a function and available to all parts of your program | Global variable |
| variable declared inside a function and available only in the function | Local variable |
| keyword to declare a global variable | Global |
| determining the order of statement execution | Flow control |
| conditional code based upon the value of true or false from provided expression | If |
| only performs action if criteria is true | Single action if |
| performs different actions depending on if criteria is true or false | Multiple action if |
| placing one control structure inside another | Nesting |
| conditional code based upon the value of a variable | Switch |
| variable that contains the value a switch uses to make a decision | Case label |
| statements in a switch that execute if no values match the case label | Default label |
| groups of statements executed as a single unit | Functions |
| variable passed to a function | Parameter |
| variable received by a function | Argument |
| returns a value from the function to the calling statement outside the function | Return statement |
| repeating code | Loop |
| indefinite style loop that executes while the criteria is true | While |
| each repetition in a loop | Iteration |
| the variable used in the criteria for the loop | Sentinel value |
| a variable used to count the number of times a loop executes | Counter |
| variable used to total data each loop execution | Accumulator |
| a loop that cannot end | Infinite loop |
| a definite loop that repeats from a start value to an end value | For |
Created by:
melissagoodall
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