How to Iterate Float List in Python

We are given a list of floats and our task is to iterate the list of floats and print the result. In this article, we will see how to iterate the float list in Python.

Example:

Input: float_list = [3.14, 2.718, 1.618, 0.707]
Output: 
Using for loop:
3.14
2.718
1.618
0.707
Explanation: Here, we are iterating over the list of floats and printing the result.

Python Iterate Over a List of Floats

Below are some of the ways by which we can iterate over a list of floats in Python:

• Using for loop
• Using for loop and range()
• Using a while loop 
• Using list comprehension 
• Using the map() function

Iterate Over a List of Floats Using the For loop

In this example, a list of floating-point numbers is iterated using a simple For loop, printing each number in the list on separate lines.

Python3

float_list = [3.14, 2.718, 1.618, 0.707]

# Iterate over the list using a for loop
print("Using for loop:")
for num in float_list:
    print(num)

Output

Using for loop:
3.14
2.718
1.618
0.707

Time complexity: O(n) – where n is the number of elements in the list.
Auxiliary space: O(1) – as we are not using any additional space.

Iterate Float List in Python Using For Loop and range()

In this example, a for loop with the range function is used to iterate over the indices of the float_list, accessing each element by index and printing them on separate lines.

Python3

float_list = [3.14, 2.718, 1.618, 0.707]

# Iterate over the list using for loop and range
print("Using for loop and range():")
for i in range(len(float_list)):
    print(float_list[i])

Output

Using for loop and range():
3.14
2.718
1.618
0.707

Time complexity: O(n), where n is the length of the input list.
Auxiliary space: O(1), which is constant space

Iterate Float List in Python Using a While Loop 

In this example, a while loop is utilized to iterate over the float_list by incrementing an index variable until it reaches the length of the list, printing each element on separate lines.

Python3

float_list = [3.14, 2.718, 1.618, 0.707]

# Iterate over the list using a while loop
print("Using while loop:")
i = 0
while i < len(float_list):
    print(float_list[i])
    i += 1

Output

Using while loop:
3.14
2.718
1.618
0.707

Time complexity: O(n) where n is the length of the list.
Auxiliary space: O(1) as only a constant amount of extra space is used for variables i and length.

Iterate Over a List of Floats Using list comprehension 

In this example, list comprehension is employed to iterate over the float_list, printing each element on separate lines directly within the comprehension.

Python3

float_list = [3.14, 2.718, 1.618, 0.707]

# Iterate over the list using list comprehension
print("Using list comprehension:")
[print(num) for num in float_list]

Output

Using list comprehension:
3.14
2.718
1.618
0.707

Iterate Float List Using the map() function

In this example, the map() function is applied to iterate over the float_list, using the print function as the mapping function to print each element on separate lines. The result is wrapped in a list to display the output.

Python3

float_list = [3.14, 2.718, 1.618, 0.707]

# Iterate over the list using the map() function
print("Using map() function:")
list(map(print, float_list))

Output

Using map() function:
3.14
2.718
1.618
0.707

Time complexity: O(n), where n is the length of the list. 
Auxiliary space: O(1)