Lambda Example (1)

• Add 10 to a variable and return the result

x = lambda a: a + 10

x(5)

Lambda Example (2)

• Multiply variable a with b and return the result

x = lambda a, b: a * b

x(5, 10)

Lambda Example (3)

• Sum the variables a, b and c and return the result

x = lambda a, b, c: a + b + c

x(5, 10, 15)

Why use Lambda? (1)

• Useful when they are used as an anonymous function that is within another function
  • i.e. a function definition takes one argument, and the argument will be divided by an unknown number

def my_function(n):
    return lambda a: a / n

• We can use the function above to always halve the number that you send to it

half_number = my_function(2)

Why use Lambda? (2)

• The same `my_function’ can be used to calculate a division by 3

def my_function(n):
    return lambda a: a / n

third_number = my_function(3)

Why use Lambda? (3)

• The function can then be used simultaneously to divide by 2 and 3

def my_function(n):
    return lambda a: a / n

half_number = my_function(2)
third_number = my_function(3)