Python Math: Round a specified decimal by setting precision

Last update on April 24 2025 12:44:28 (UTC/GMT +8 hours)

40. Precision-Based Rounding of Decimal

Write a Python program to round a specified decimal by setting precision (between 1 and 4).

Sample Solution:

Python Code:

import decimal

d = decimal.Decimal('00.26598')
print("Original Number : ",d)
for i in range(1, 5):
    decimal.getcontext().prec = i
    print("Precision-",i, ':', d * 1)

Sample Output:

Original Number :  0.26598                                                                                    
Precision- 1 : 0.3                                                                                            
Precision- 2 : 0.27                                                                                           
Precision- 3 : 0.266                                                                                          
Precision- 4 : 0.2660

Pictorial Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to round a specified Decimal number to various precisions (1 to 4) and print each rounded value.
• Write a Python function that takes a Decimal and a precision value, rounds the number accordingly, and returns the rounded result as a string.
• Write a Python script to prompt for a Decimal number and a desired precision, then output the number rounded to that precision using the quantize() method.
• Write a Python program to compare the output of rounding a Decimal number using different precision settings and display the differences.

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