Python Exercise: Check whether a number falls in a given range

Last update on April 22 2025 12:58:54 (UTC/GMT +8 hours)

6. Check if a Number Falls Within a Given Range

Write a Python function to check whether a number falls within a given range.

Sample Solution-1:

Python Code:

# Define a function named 'test_range' that checks if a number 'n' is within the range 3 to 8 (inclusive)
def test_range(n):
    # Check if 'n' is within the range from 3 to 8 (inclusive) using the 'in range()' statement
    if n in range(3, 9):
        # If 'n' is within the range, print that 'n' is within the given range
        print("%s is in the range" % str(n))
    else:
        # If 'n' is outside the range, print that the number is outside the given range
        print("The number is outside the given range.")

# Call the 'test_range' function with the argument 5
test_range(5)

Sample Output:

 5 is in the range
 

Explanation:

In the exercise above the code defines a function called "test_range()" that checks if the given number 'n' falls within the specified range (from 3 to 8). It then calls this function with the argument 5 and prints whether the number is within or outside the specified range.

Pictorial presentation:

Flowchart:

Sample Solution-2:

• Use arithmetic comparison to check if the given number is in the specified range.
• If the second parameter, end, is not specified, the range is considered to be from 0 to start.

Python Code:

# Define a function named 'test_range' that checks if a number 'n' is within a specified range.
# The range is determined by 'start_num' and 'end_num' (with 'end_num' having a default value of 0)
def test_range(n, start_num, end_num=0):
    # Check if 'end_num' is greater than or equal to 'start_num'
    # If true, use 'start_num <= n <= end_num' to determine if 'n' is within the range
    # If false, swap 'end_num' and 'start_num' and check 'end_num <= n <= start_num'
    return start_num <= n <= end_num if end_num >= start_num else end_num <= n <= start_num

# Print the result of checking if 5 is within the range from 2 to 7 (inclusive)
print(test_range(5, 2, 7))

# Print the result of checking if 5 is within the default range from 7 to 0 (inclusive)
print(test_range(5, 7))

# Print the result of checking if 1 is within the range from 3 to 6 (inclusive)
print(test_range(1, 3, 6))

# Print the result of checking if 6 is within the range from 5 to the default value 0 (inclusive)
print(test_range(6, 5))

Sample Output:

True
True
False
False
 

Explanation:

In the exercise above the code defines a function "test_range()" that checks if a given number n falls within a specified range (start_num to end_num). If end_num is not provided, it defaults to 0. The function then performs a range check and prints the results of various range checks involving different combinations of input values.

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python function that accepts a number and two boundaries, and returns True if the number is between them (inclusive), otherwise False.
• Write a Python function that uses a ternary operator to check if a number is within a specified range and returns a custom message.
• Write a Python function that validates input types and then checks if the number falls within the range, raising an exception if not.
• Write a Python function that uses lambda to create a quick range-checking function and tests it on various inputs.

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Python Code Editor:

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