1.2.1: be able to follow and write algorithms (flowcharts, pseudocode, program code) that use sequence, selection, repetition (count-controlled, condition-controlled) and iteration (over every item in a data structure), and input, processing and output to solve problems
| Keyword | Definition |
|---|---|
| algorithm | step by step instructions to solve a problem |
| boolean expression | question with a true or false answer |
| count-controlled repetition | repeating instructions a set number of times |
| data structure | variable which stores multiple values (such as a string, record or array) |
| input | data that goes into an algorithm |
| iteration | executing instructions multiple times - once for each value in a data structure |
| output | information that comes out of an algorithm |
| post-conditioned repetition | repeating instructions one or more times based on a boolean expression |
| pre-conditioned repetition | repeating instructions zero or more times based on a boolean expression |
| process | calculations performed within an algorithm |
| selection | instructions which choose what is executed next based on a boolean expression |
| sequence | more than one instruction that have to be executed in a particular order |
