07 JUN 2019

We studied new string functions and new list functions. Then, We studies loops. we began with for–loop (which is also called foreach loop). for-loop iterates over a list and “visits” all of the items in a sequentially order.  We wrote a for-loop to iterate over a list of strings (i.e.: [‘danny’, ‘orli’, ‘yossi’]) and a a for-loop to iterate over a list of numbers (i.e.: [2, -200, 3, 4, 100]). We saw the break command, which exits the for current loop immediately. as an example we wrote a python code which sums up numbers in a given list- until we reach the end of the list or until we reach a a total sum of 100 (using break). In the last part of the lesson we saw how to write a nested for-loop, which is a loop inside a loop (parent-child loop). we used it to iterate through a parent list which contains a child list. i.e.: [ [11, 9, 100] , [-5, 1000, 200], [5], [2, 4, 2, 1] ]. we saw that break in the inner loop only exists the inner loop, but the parent loop keeps going on

More topics covered:

• Sorted command – sort and also returns a new list
• reversed command – reverse and also returns a new list
• Debugger usage – introduction
• boolean
• print using f:  print ( f'{a} + {b} = {c}’)

Links:

• Previous lesson homework solution
• Class code: python strings
• Class code: python lists
• Class code: simple for-loop
• Class code: for-loop with break
• Class code: nested for-loop
• Python string methods – link
• Python list methods – link
• Home work!
• Lesson Summary Video!