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high-level algorithm

includes the major part of a solution, but leaves the details until later


a step-by-step procedure for solving a problem.

stepwise refinement

process for developing a detailed algorithm by gradually adding detail to a high-level algorithm.


an action that an object can take or a task that it can perform in response to a request from an external source


instructions to perform a specific task in the program

sequential execution

statements are executed one after another in the order that they appear in the source code


is any expression that can be either true or false

repetition structure

allows a group of statements to be executed several times in succession

body of the loop

block of statements that can be executed repeatedly


Each time that the statements in the body are executed

while loop

This is a loop in which a process continues while some condition continues to be true.

if statement

Not a loop - tests condition for true or false, only executed once


is there a flower ahead of the Jeroo


is there no flower, net, water, or other Jeroo ahead


used when asking if there is not any water ahead of the Jeroo

Sensor method

allows the jeroo to check the island for a specific situation


used when asking if there is not a net to the left of the Jeroo

user defined methods

Methods written by the user which are not part of the language.


and - used in an if statement


something that is true or false

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