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;
12 Cards in this Set
- Front
- Back
|
sequence |
sequence means that each instruction is executed once in the order that it is given |
|
|
selection (if else) |
selection is used when the computer executed one of a number of instructions based on a condition. you can use ELIF statements are useful if you have multiple criteria |
|
|
iteration |
iteration means repeating an instruction a set number of times or until a condition is met FOR loops are used to repeat an instruction a set number of times WHILE loops repeat an instruction until a condition is met. |
|
|
Variable |
store data for use later in your program. you put this in RAM a variable is a named location in memory where the programmer can store data. |
|
|
Data types |
char - single character - A integer - a whole number - 567 string - a sequence of characters - hello Boolean - true or false - TRUE Float - a decimal number - 567.89 |
|
|
converting between data types |
in some languages you have to say what data type the variable will be when you first declare it Python will just guess based on what you put in the variable so if you say X=5 it will assume X is an integer explicitly convert the variable to the correct type str(X) - string int(X) - integer float(X) - float |
|
|
constants |
constants are locations in memory where the programmer can store data once a constant has a value it cant be change const pi = 3.14 |
|
|
subroutines |
block of code that performs a specific task |
|
|
procedures |
a procedure is a subroutine that does not return a value to the main block of code |
|
|
functions |
subroutine that does return a value to the main block of code easy to spot because they contain the word return |
|
|
string handling |
MID("Hello world",2,6) llo w LEGNTH("Hello") 5 LEFT("Hello",2) Hel RIGHT("Hello",3) lo LOCATE("Hello","o") 4 |
|
|
Assembly language |
low level language this means it is more difficult to understand and code than high-level languages but it is closer to machine code (binary) Assembly language includes mnemonics (two or three letter acronyms eg ADD) as names for data stores and instructions. |
