Using the $ character or the ${ }  expression within single or double quotes we can convert a non-string value or an expression into string. When converting a single variable into string we will just prefix that variable with the $ sign. When converting an expression we will write it within the curly braces of ${ }.

void main() 
  var numA = 3;
  var numB = 4;
  print("$numA + $numB = ${numA+numB}");

The following video clip shows the execution of this code sample, overviews it and explains it.

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