Variable not found

p5.js Beginners
6

However, if "strict mode"; is active, accessing undeclared variables throws an exception: :scream:

Assignments, which would accidentally create global variables, instead throw an error in strict mode:

'use strict';
                       // Assuming a global variable mistypedVariable exists
mistypeVariable = 17;  // this line throws a ReferenceError due to the 
                       // misspelling of variable
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