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807208
Raptor
Description
Mind Map on Raptor, created by carloscharris.dm on 29/04/2014.
Mind Map by
carloscharris.dm
, updated more than 1 year ago
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Created by
carloscharris.dm
almost 11 years ago
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Resource summary
Raptor
Visual programming development environment
Based on flowcharts
Why use it?
Minimizes the amount of syntax you must learn
Easy of use
Error messages easy to understand
Doesn´t require a heavy-weight commercial programming language
For example
C++
Java
Symbols
Start
End
Loop
Call
Input
Output
Selection
Processing
Variables
Only holds a single value
The value can change as a program excecutes
Ways to set or change a variable
By the value entered in an input statement
By the value calculated from an ecuation in an assignment statement
By a return value from a procedure call
Poor variables names
Examples
a
Not descriptive
Milesperhour
Add underscores
My4to
Not descriptive
Illegal variables names
Examples
4sale
Doen´t start with a letter
Sales tax
Includes a space
Sales$
Includes invalid character
Good varible names
Examples
Tax_rate
Sales_tax
Distance_in_miles
Mpg
Common errors
"Variable ____ does not have a value"
Common reasons
The variable has not been given a value
The variable name was misspelled
"Can't assign string to numeric variable _____" "Can't assign numeric to string variable _____"
If the statements attempt to change the data type of a variable.
Operations
+
Addition
-
Subtraction
Negation
*
Multiplication
/
Division
^ **
Exponentiation, raise a number to a power
rem mod
Remainder when the right operand divides the left operand
sqrt
Square root
log
Natural logarithm (base e)
abs
Absolute value
ceiling
Rounds up to a whole number
floor
Rounds down to a whole number
sin
trig sin(angle_in_radians)
cos
trig cos(angle_in_radians)
tan
trig tan(angle_in_radians)
cot
trig cotangent(angle_in_radians)
arcsin
trig sin-1(expression), returns radians
arcos
trig cos-1(expression), returns radians
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