Seite - 74 - in Programming for Computations – Python - A Gentle Introduction to Numerical Simulations with Python 3.6, Band Second Edition

74 3 LoopsandBranching 3.4 Exercises Exercise3.1:AforLoopwith Errors Assume some program has been written for the task of adding all integers i = 1,2,.. .,10andprinting thefinal result: for i in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10) sum = Sum + x print ’sum: ’, sum a) Identify theerrors in theprogramby just reading thecode. b) Write a newversionof the programwith errorscorrected.Run thisprogramand confirmthat it gives thecorrectoutput. Filename:for_loop_errors.py. Exercise3.2:TherangeFunction Write a slightly different version of the program in Exercise 3.1. Now, therange function should be used in the for loop header, and only the even numbers from [2,10]shouldbeadded.Also, the (only)statementwithin the loopshould readsum = sum + i. Filename:range_function.py. Exercise3.3:Awhile Loop withErrors Assume some program has been written for the task of adding all integers i = 1,2,.. .,10: some_number = 0 i = 1 while i < 11 some_number += 1 print some_number a) Identify theerrors in theprogramby just reading thecode. b) Write a newversionof the programwith errorscorrected.Run thisprogramand confirmthat it gives thecorrectoutput. Filename:while_loop_errors.py. Exercise3.4:while LoopInstead of forLoop Rewriteaverage_height.pyfromSect.3.1.3,usingawhile loop instead. Filename:while_instead_of_for.py. Exercise3.5:CompareIntegersaand b Explainbriefly, in yourownwords,what the followingprogramdoes. a = int(input(’Give an integer a: ’)) b = int(input(’Give an integer b: ’))