Python: Construct a Decimal from a float and a Decimal from a string

Last update on April 02 2025 12:31:41 (UTC/GMT +8 hours)

1. Decimal Construction

Write a Python program to construct a Decimal from a float and a Decimal from a string. Also represent the decimal value as a tuple. Use decimal.Decimal

Sample Solution:

Python Code:

import decimal
print("Construct a Decimal from a float:")
pi_val = decimal.Decimal(3.14159)
print(pi_val)
print(pi_val.as_tuple())
print("\nConstruct a Decimal from a string:")
num_str = decimal.Decimal("123.25")
print(num_str)
print(num_str.as_tuple())

Sample Output:

Construct a Decimal from a float:
3.14158999999999988261834005243144929409027099609375
DecimalTuple(sign=0, digits=(3, 1, 4, 1, 5, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 2, 6, 1, 8, 3, 4, 0, 0, 5, 2, 4, 3, 1, 4, 4, 9, 2, 9, 4, 0, 9, 0, 2, 7, 0, 9, 9, 6, 0, 9, 3, 7, 5), exponent=-50)

Construct a Decimal from a string:
123.25
DecimalTuple(sign=0, digits=(1, 2, 3, 2, 5), exponent=-2)

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to construct a Decimal from a float, a Decimal from a string, and then represent both as tuples using the as_tuple() method.
• Write a Python function that takes a float and a string, converts them into Decimal objects, and prints their tuple representations side by side.
• Write a Python script to generate a Decimal from a float and one from a string, compare their tuple representations, and print whether they are identical.
• Write a Python program that converts a list of floats and a list of corresponding strings to Decimals, then prints each Decimal’s tuple representation.

Python Code Editor:

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