break and continue
The break statement breaks out of a loop. In the example below, once counter reaches n (counter == n), the break statement is executed, which then makes the program go to line 8.
def countToN(n):
counter = 1
while(True):
print(counter)
if(counter == n):
break
counter += 1
print("bye!")
The continue statement breaks out of the current iteration and skips to the next iteration. In the example above, in iterations where x is even (x % 2 == 0), the continue statement is executed, which makes the program go to the next iteration, i.e. it skips line 6.
def sumOfOddsToN(n):
total = 0
for x in range(1, n+1):
if(x % 2 == 0):
continue
total += x
return total
Optional parameters
# Below y is an optional parameter.
# When calling the function, if a second argument is given, that value
# will be assigned to y. If a second argument is not given, by default,
# y will be assigned the value 10.
def f(x, y=10):
return x+y
print(f(5)) # prints 15
print(f(5,6)) # prints 11
Examples covered in class
Computing square root using Newton's method.
Approximating the prime-counting function.
walkThroughDigits
digitCount
largestDigit
countOfMostFreqDigit
mostFreqDigit
isSubnumber
longestDigitRun
isRotation
nthPalindromicPrime
