BASIC to Arduino C: Arduino C programming for Basic Programmers Cheat Sheet



The Cheat Sheet

BASIC to Arduino C. Below is a short list of common C and BASIC functions. It is designed to take a BASIC programmer and get him started in Arduino C.

This is of course only a short list of the most common functions. More will be added to this web site in time.

------------------- BASIC TO ARDUINO C -------------------

Comments / Remarks / Telling the compiler to ignore a line

“ ‘ ” (a single quote)

rem x = 3
‘ Ignore this comment.

C Language: double forward slashes “//”

// x = 3;
// Ignore this comment.


A forward slash “/”, and an asterisks “*”, followed by text, followed by another asterisks “*” and another forward slash “/”.

This is a series of comments
Another comment
And another

------------------- BASIC TO ARDUINO C -------------------

Indication of End of a Line
Basic: At the end of a line of code no special punctuation is required.

x = 3
y = 4

C Language: At the end of a line of code a semicolon “;” is required.

x = 3;
y = 4;

------------------- BASIC TO ARDUINO C -------------------

Variables (“Variants” for BASIC)
BASIC: use a variable and the system takes care of what kind of variable it is based on how you use it these super variables are called “variants”.

X = 5 rem X is an integer.
Y = 5/2 rem Y is a real number.
Z = TRUE rem Z is a boolean number (logically true or false).

C: All variables MUST be declared BEFORE they are used as to how they will be used.
int X; // x is an integer.
Float Y; // x is a “float” ( a number with a decimal point—a “floating point” number to be exact.)
Bool Z;

------------------- BASIC TO ARDUINO C -------------------

Mathematics (for the most part it’s the same)
Basic: x = y/3
C Language: x = y/3;

------------------- BASIC TO ARDUINO C -------------------

Assignments (for the most part it’s the same)
Basic: x = 3
C Language: x = 3;

------------------- BASIC TO ARDUINO C -------------------

If x = 3 then y = true

If x = 3 then
Print “done”
Print “for now”
Print “not done”

Not equals: <>
Less than: <
Greater than: >

C Language:
If ( x ==3) y = true;
// no “then” needed in C. Also note the DOUBLE equal signs ==

If (x == 3 )

y = true;
z = true;
End if

Not equals: !=
Less than: <
Greater than: >

Warning: Beware of accidentally using the single equal sign (e.g. "if (x = 10)" is WRONG, but "if (x==10)" is RIGHT!). This won’t result in an error, but will not be right. In the C language, a single equal sign ALWAYS MEANS ASSIGNMENT. A DOUBLE equals is used for comparison.

------------------- BASIC TO ARDUINO C -------------------

Counting / incrementing / decrementing
x = x + 1
x = x-1

C Language adding 1 to x:
x = x + 1;
x = x + +;

C Language subtracting 1 from x:
x = x - 1;
x = x --;

------------------- BASIC TO ARDUINO C -------------------

Basic “for” loop:
For x = 1 to 4
Print “hello”

C Language “for” loop :
For (x=1; x<5; x++)
Println “hello”

------------------- BASIC TO ARDUINO C -------------------

print x
print “hello”

C Language:
println( x);
println “hello”;

------------------- BASIC TO ARDUINO C -------------------

x = “hello”& “world”

C Language:
x = “hello”, “world”

------------------- BASIC TO ARDUINO C -------------------


The structure of a BASIC program differs in a few different ways than that of a C program. See the examples below.

Remember: BASIC has "subroutines" and C language has "functions". Both work about the same. In Basic you use "gosub" to call a subroutine. In C you just use the name of the function.

In BASIC you can make infinite loops with "goto" statements. In C (on the arduino) you use "loop".



X = 3

// your looping code goes here
gosub mysub
Goto here

Rem do some stuff

C Language:

// Note: The word “void” you see at the start of most functions means that a function does not return any values.

int buttonPin = 3; // You need to initialize your variables before doing anything else.

// Note: the function below called “setup” is a function used to initialize variables, pin modes, start using libraries, etc. It runs only once. The function called “loop” will loop forever.

void setup()
Serial.begin(9600); // start writing outputs to console window
// your setup code goes here

void loop() // this code will loop forever. Just what we need for robots.
// your looping code goes here

BASIC to Arduino C: Click HERE to go to the official Arduino web site.

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