Function Parameters
- 2. Sending Data into a Function Can pass values into a function at time of call: c = pow(a, b) time.sleep(2) Values passed to function are arguments Variables in a function that hold the values passed as arguments are parameters
- 3. A Function with a Parameter Variable def displayValue(num): print("The value is ", num) The integer variable num is a parameter. It accepts any value passed to the function.
- 5. Function Call Notes Value of argument is copied into parameter when the function is called A parameter’s scope is the function which uses it Function can have multiple parameters
- 6. Passing Multiple Arguments When calling a function and passing multiple arguments: The number of arguments in the call must match the prototype and definition The first argument will be used to initialize the first parameter, the second argument to initialize the second parameter, etc.
- 7. Passing Multiple Arguments Example
- 8. Passing Data by Value Pass by value: when an argument is passed to a function, its value is copied into the parameter. Changes to the parameter in the function do not affect the value of the argument Example: val = 5 evenOrOdd(val) evenOrOdd can change variable num, but it will have no effect on variable val 5 val argument in calling function 5 num parameter in evenOrOdd function
- 9. Returning Multiple Values The python return statement unlike other languages can return multiple values Code: Function call with multiple return values var1, var2, … = function()
- 10. Functions as Parameters Parameters can be functions Remember a function can return a value (transitive property)