﻿ Python: Find the indexes of numbers, below a given threshold - w3resource

# Python: Find the indexes of numbers, below a given threshold

## Python Programming Puzzles: Exercise-11 with Solution

Write a Python program to find the indexes of numbers in a given list below a given threshold.

```Input:
[(100,(0, 12, 45, 3, 4923, 322, 105, 29, 15, 39, 55))]
Output:
[0, 1, 2, 3, 7, 8, 9, 10]

Input:
[(10,(0, 12, 4, 3, 49, 9, 1, 5, 3))]
Output:
[0, 2, 3, 5, 6, 7, 8]
```

Visual Presentation:

Sample Solution:

Python Code:

``````# License: https://bit.ly/3oLErEI

# Define a function named 'test' that takes a list of numbers 'nums' and a threshold 'thresh' as input
def test(nums, thresh):
# Use a list comprehension to find the indexes (i) of numbers in 'nums' that are below the given threshold 'thresh'
return [i for i, n in enumerate(nums) if n < thresh]

# Create a list of numbers 'nums' with specific elements
nums = [0, 12, 45, 3, 4923, 322, 105, 29, 15, 39, 55]

# Assign a threshold value 'thresh' to the variable
thresh = 100

# Print the original list of numbers
print("Original list:")
print(nums)

# Print the threshold value
print("Threshold: ", thresh)

# Print a message indicating the operation to be performed on the list
print("Check the indexes of numbers of the said list below the given threshold:")

# Print the result of the test function applied to the 'nums' list with the given threshold value
print(test(nums, thresh))

# Create a different list of numbers 'nums' with specific elements
nums = [0, 12, 4, 3, 49, 9, 1, 5, 3]

# Assign a different threshold value 'thresh' to the variable
thresh = 10

# Print the original list of numbers
print("\nOriginal list:")
print(nums)

# Print the updated threshold value
print("Threshold: ", thresh)

# Print a message indicating the operation to be performed on the list
print("Check the indexes of numbers of the said list below the given threshold:")

# Print the result of the test function applied to the modified 'nums' list with the updated threshold value
print(test(nums, thresh))
``````

Sample Output:

```Original list:
[0, 12, 45, 3, 4923, 322, 105, 29, 15, 39, 55]
Threshold:  100
Check the indexes of numbers of the said list below the given threshold:
[0, 1, 2, 3, 7, 8, 9, 10]

Original list:
[0, 12, 4, 3, 49, 9, 1, 5, 3]
Threshold:  10
Check the indexes of numbers of the said list below the given threshold:
[0, 2, 3, 5, 6, 7, 8]
```

Flowchart:

Python Code Editor :

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