Variables#
The ImageJ Macro language is very friendly: there is no need to specify what we want to store in a variable, we can just assign it a value.
Variables
number = 42; // (1)!
// But a variable can also represent text (aka "string")
// (2)!
message = "This is also a variable";
// Verify the value of a variable by printing to the console
print(message);
- Never forget the semi-colon ";"!
- While we are here, this is how your add comments to your code!
Once you have defined a variable, you can simply do math with it.
Adding, multiplying variables
number = 15.6;
// Addition
number = number + 3;
print(number);
// Multiplication
new_number = number * 3;
print(new_number);
// Increment
counter = 0;
counter = counter + 1;
counter++;
What does counter++ do?
That's right, it does exactly the same as counter = counter + 1
What happens when you use mathematical operations on strings?
