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based on an earlier version of the Wolfram Language.
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returns the value expr from a function.
returns the value Null.
  • Return[expr] exits control structures within the definition of a function, and gives the value expr for the whole function.
  • Return takes effect as soon as it is evaluated, even if it appears inside other functions.
Return from a function:
Return from a function:
Click for copyable input
Click for copyable input
Return exits only the innermost construct in which it is invoked:
Here it exits the Do loop, but not the function :
Use Catch and Throw for explicit flow control:
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