Seite - 59 - in Programming for Computations – Python - A Gentle Introduction to Numerical Simulations with Python 3.6, Band Second Edition

3LoopsandBranching 3.1 TheforLoop Many computations are repetitive by nature and programming languages have certain loopstructures to dealwith this. Onesuch loopstructure is the for loop. 3.1.1 Example:Printingthe5TimesTable Assume the task is to print out the 5 times table. Before having learned about loop structures inprogramming,mostofuswouldfirst thinkofcoding this like: # Naively printing the 5 times table print(’{:d}*5 = {:d}’.format(1, 1*5)) print(’{:d}*5 = {:d}’.format(2, 2*5)) print(’{:d}*5 = {:d}’.format(3, 3*5)) print(’{:d}*5 = {:d}’.format(4, 4*5)) print(’{:d}*5 = {:d}’.format(5, 5*5)) print(’{:d}*5 = {:d}’.format(6, 6*5)) print(’{:d}*5 = {:d}’.format(7, 7*5)) print(’{:d}*5 = {:d}’.format(8, 8*5)) print(’{:d}*5 = {:d}’.format(9, 9*5)) print(’{:d}*5 = {:d}’.format(10, 10*5)) ©The Author(s) 2020 S.Linge, H.P. Langtangen, Programming forComputations -Python, Texts in Computational Science and Engineering 15, https://doi.org/10.1007/978-3-030-16877-3_3 59