lambda function

https://youtu.be/8TVWQwEkcFg

Lambda function:

#without using Lambda

def square(x):

    n=x*x

    return n

#reading the value from the keyboard, store into x

x=int(input("enter any value "))

#call the function

n=square(x)

print("square of %i value is=%i"%(x,n))

"""

enter any value 4

square of 4 value is=16

>>> """

#By using lambda function

a=lambda n:n*n

n=int(input("enter n value"))

print("square root of %i=%i"%(n,a(n)))

"""

output:

enter n value4

square root of 4=16

>>> """     

Lambda function:

We can define by using lambda keyword. A function without a name is called ‘anonymous function” or Lambdas function, so far function were written by using function name and keyword ‘def’. But Lambda function can be used by using the keyword ‘lambda’.

Syntax: lambda arguments:expression

Example: lambda n:n*n

Advantages: Code can be reduced so that code readability can be improved.

Find sum of two numbers by using lambda function:

#sum of two numbers using lambda function

#lambda arguments:expression

s=lambda a,b:a+b

a=int(input("enter any value"))

b=int(input("enter any value"))

print("Sum of two nos are",s(a,b))

"""

output:

enter any value2

enter any value3

Sum of two nos are 5

"""

Note: (1)Lambda function internally returns expression value and we are not required to write return statement explicitly.

(2)sometimes we can pass function as actual parameter to another function, in such case we use lambda functions.

Find biggest of given numbers:

Syntax: lambda arguments:expression

Largest of two nos: Normal function:

def big(a,b):

  if a>b:

    print(“a is big”)

 else:

    print(“b is big”)

Largest of two nos: By using lambda function:

n=lambda a,b:a if a>b else b

print("big is",n(10,20))

"""output:

big is 20""

Related video: https://youtu.be/8TVWQwEkcFg
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