04-python-functions-lab.py

# ## Challenges

# 1. Write a function named `sum_to` that accepts a single integer, `n`, and returns the sum of the integers from 1 to `n`.
	
# 	For example:

# 	```python
# 	sum_to(6)  # returns 21
# 	sum_to(10) # returns 55
# 	```
def sum_to(nums):
  sum = 0
  for n in range(1, nums + 1):
    sum += n
  return sum

# 2. Write a function named `largest` that takes a list of numbers as an argument and returns the largest number in that list.

# 	For example:    
	
# 	```python
# 	largest([1, 2, 3, 4, 0])  # returns 4
# 	largest([10, 4, 2, 231, 91, 54])  # returns 231
# 	```

def largest(n):
  n.sort()
  return n[-1]

# 3. Write a function named `occurances` that takes two string arguments as input and counts the number of occurances of the second string inside the first string.

# 	For example:

# 	```python
# 	occurances('fleep floop', 'e')   # returns 2
# 	occurances('fleep floop', 'p')   # returns 2
# 	occurances('fleep floop', 'ee')  # returns 1
# 	occurances('fleep floop', 'fe')  # returns 0
# 	```

def occurances(string, occur):
  return string.count(occur)

# 4. Write a function named `product` that takes an *arbitrary* number of numbers, multiplies them all together, and returns the product.<br>(HINT: Review your notes on `*args`).

# 	For example:
	
# 	```python
# 	product(-1, 4) # returns -4
# 	product(2, 5, 5) # returns 50
# 	product(4, 0.5, 5) # returns 10.0
# 	```
def product(*args):
  product = 1
  for arg in args:
    product *= arg
  return product