Hướng dẫn dùng alleven python

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Nội dung chính

• Method: Using recursion 
• Method: Using the lambda function 
• Method: Using list comprehension 
• Method: Using enumerate function 
• Method: Using pass 
• How do you print the sum of even numbers in Python?
• How do you find the range of even numbers in Python?
• How do you print the sum of odd and even numbers in Python?
• How do you add even numbers in a list in Python?

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Given starting and end points, write a Python program to print all even numbers in that given range. Example:

Input: start = 4, end = 15
Output: 4, 6, 8, 10, 12, 14

Input: start = 8, end = 11
Output: 8, 10

Example #1: Print all even numbers from given list using for loop Define start and end limit of range. Iterate from start till the range in the list using for loop and check if num % 2 == 0. If the condition satisfies, then only print the number. 

Python3

for num in range(4,15,2):

    print(num)

Output:

4 6 8 10 12 14 

  Example #2: Taking range limit from user input 

Python3

start = int(input("Enter the start of range: "))

end = int(input("Enter the end of range: "))

for num in range(start, end + 1):

    if num % 2 == 0:

        print(num, end = " ")

Output:

Enter the start of range: 4
Enter the end of range: 10
4 6 8 10 

Example#3 Taking range limit user input and uses skip sequence number in range function which generate the all even number. 

Python3

start = int(input("Enter the start of range: "))

end = int(input("Enter the end of range: "))

start = start+1 if start&1 else start

[ print( x ) for x in range(start, end + 1, 2)]

Output:

Enter the start of range: 4
Enter the end of range: 10
4 6 8 10 

Method: Using recursion 

Python3

def even(num1,num2):

    if num1>num2:

        return

    print(num1,end=" ")

    return even(num1+2,num2)

num1=4;num2=15

even(num1,num2)

Method: Using the lambda function 

Python3

a=4;b=15

li=[]

for i in range(a,b+1):

    li.append(i)

even_num = list(filter(lambda x: (x%2==0),li)) 

print(even_num)

Output

[4, 6, 8, 10, 12, 14]

Method: Using list comprehension 

Python3

x=[i for i in range(4,15+1) if i%2==0]

print(*x)

Method: Using enumerate function 

Python3

a=4;b=15;l=[]

for i in range(a,b+1):

  l.append(i)

print([a for j,a in enumerate(l) if a%2==0])

Output

[4, 6, 8, 10, 12, 14]

Method: Using pass 

Python3

a=4;b=15

for i in range(a,b+1):

  if i%2!=0:

    pass

  else:

    print(i,end=" ")