LEARNING OBJECTIVES
Design a wix page template for Computer Science.
SUCCESS CRITERIA
Success Criteria:
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Choose a colour scheme
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Create suitable text boxes
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Decide on content layout
3.1 Programming Techniques
Learners should have studied the following:
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3.1.1 how to identify and use variables, operators, inputs, outputs and assignments
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3.1.2 how to understand and use the three basic programming constructs used to control the flow of a program: Sequence; Selection; Iteration
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3.1.3 how to understand and use suitable loops including count and condition controlled loops
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3.1.4 how to use different types of data, including Boolean, string, integer and real, appropriately in solutions to problems
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3.1.5 how to understand and use basic string manipulation
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3.1.6 how to understand and use basic file handling operations:
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open
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read
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write
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close
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3.1.7 how to define and use arrays (or equivalent) as appropriate when solving problems
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3.1.8 how to understand and use functions/sub programs to create structured code.
3.1.1 variables, operators, inputs, outputs and assignments
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how to identify and use variables, operators, inputs, outputs and assignments
Variables
In a program, data values can be constant or variable. If values are variable they can be changed by the program and the user.
When a program is run, the data values are held in memory whilst they are being worked on.
Variables are data values that can change when the user is asked a question, for example, their age. Variables may change during program execution.
A variable is a memory location. It has a name that is associated with that location. The memory location is used to hold data. The key difference when comparing a constant to a variable is that the value associated with a variable name may change during program execution. For example 'highScore' would need to be variable to change throughout a game.
The content and organisation of a computer's memory is not fixed - so neither is the value that is pointed at by a variable.
When data is read from a variable, the content of the memory location is copied and used in calculations.
variables in python...
WE ARE LEARNING..
Operators
An operator is a symbol that tells the computer to perform a certain logical or mathematical or logical manipulations.
Arithmetic Operators
Many of the operators you have encountered so far may be mathematical, for example
+ (addition), - (subtraction), * (multiplication), and / (division). These are standard mathematical operations that can be applied to numeric data types, the results of such operations being assigned to a variable. EXAMPLE: total = num1 + num2
variables in python...
CODING TIP
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did you know?
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STARTER
Below are images that can be used in a chess game. The images act as variables, what variable names would be considered sensible for the images outlined below?
