Python Programming | JNTUA | UNIT 2 | Fruitful Functions |

Python Programming | JNTUA | UNIT 2 | Fruitful Functions |

• 1.
  Python Programming Unit –II (Part III) (Lecture 12) Fruitful functions Return values Incremental development Nested functions
• 2.
  Fruitful functions Lecture 12Lecture 13 Return values Incremental development Nested functions Boolean functions More recursion Checking types
• 3.
  Fruitful functions Lecture 12 Returnvalues Incremental development Nested functions
• 4.
  • As soonas a return statement executes, the function terminates without executing any subsequent statements. • Code that appears after a return statement is called dead code. Return values
• 5.
  Return values Function: Statement 3 Statement4 Statement 5 Statement 6 …. …. Program: Statement 1 Statement 2 Call function Statement 7 Call function …. …. Executed Function without return
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  Return values Function: Statement 3 Statement4 return Statement 5 Statement 6 …. …. Program: Statement 1 Statement 2 Call function Statement 7 Call function …. …. Executed Function with return Dead code
• 7.
  Fruitful functions Lecture 12 Returnvalues Incremental development Nested functions
• 8.
  Incremental development • Largerfunctions are difficult to debug. • To deal with complex programs, use incremental development. • The goal of incremental development is to avoid long debugging sessions by adding and testing only a small amount of code at a time.
• 9.
  Incremental development • Supposeyou want to find the distance between two points, given by the coordinates (x1, y1) and (x2, y2). • By the Pythagorean theorem, the distance is:
• 10.
  Fruitful functions Lecture 12 Returnvalues Incremental development Nested functions
• 11.
  Nested functions • Wecan call one function from within another. This ability is called composition.
• 12.
  Fruitful functions Lecture 12 Returnvalues Incremental development Nested functions
• 13.
  Python Programming Unit –II (Part III) (Lecture 13) Fruitful functions Boolean functions More recursion Checking types
• 14.
  Fruitful functions Lecture 12Lecture 13 Return values Incremental development Nested functions Boolean functions More recursion Checking types
• 15.
  Fruitful functions Lecture 13 Booleanfunctions More recursion Checking types
• 16.
  Boolean functions • Functionscan return Booleans. • For hiding complicated tests inside functions.
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  Fruitful functions Lecture 13 Booleanfunctions More recursion Checking types
• 18.
  More recursion
• 19.
  More recursion
• 20.
  Fruitful functions Lecture 13 Booleanfunctions More recursion Checking types
• 21.
  Checking types
• 22.
  Checking types • Wecan use the built-in function isinstance to verify the type of the argument.
• 23.
  Fruitful functions Lecture 13 Booleanfunctions More recursion Checking types