[] in dart function code example

Example 1: dart function

when you want to make a function that 
doesn't use the format return or a function that doesn't return a value
the function base will look like this:

void functionName() {

}

if its returning some thing it will look like this:

functionName() {
	
}

Example 2: dart function syntax

sum(x, y) {
	return x + y;
}

// This is where the app starts executing.
void main() {
  print(sum(3,5)); // => 8
}

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