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Python: Iterate over two lists simultaneously

Python List: Exercise - 64 with Solution

Write a Python program to iterate over two lists simultaneously.

Sample Solution-1:

Python Code:

num = [1, 2, 3]
color = ['red', 'white', 'black']
for (a,b) in zip(num, color):
     print(a, b)
	 

Sample Output:

1 red                                                                                                         
2 white                                                                                                       
3 black

Pictorial Presentation:

Python List: Iterate over two lists simultaneously.

Flowchart:

Flowchart: Iterate over two lists simultaneously

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Sample Solution-2:

Python Code:

def print_itr(itr1, itr2, fn):
    for (itr1, itr2) in zip(num, color):
     fn(itr1, itr2)     
num = [1, 2, 3]
color = ['red', 'white', 'black']
print_itr(num, color, print)

Sample Output:

1 red
2 white
3 black

Flowchart:

Flowchart: Iterate over two lists simultaneously

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Python Code Editor:

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Previous: Write a Python program to insert a given string at the beginning of all items in a list.
Next: Write a Python program to move all zero digits to end of a given list of numbers.

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Python: Tips of the Day

Floor Division:

When we speak of division we normally mean (/) float division operator, this will give a precise result in float format with decimals.

For a rounded integer result there is (//) floor division operator in Python. Floor division will only give integer results that are round numbers.

print(1000 // 300)
print(1000 / 300)

Output:

3
3.3333333333333335