← Errors
OverflowError is raised when an arithmetic operation produces a result too large to be represented within the numeric type. Python integers are arbitrary-precision and never overflow, but floats are IEEE 754 doubles and can reach infinity.
Why it happens
- •Calling math.exp(), math.pow(), or similar functions with very large arguments.
- •A floating-point computation produces a value larger than sys.float_info.max.
- •Using C extension code that operates on fixed-width integers.
- •Integer-to-float conversion of a very large Python integer.
Examples
Python
Code that triggers the error
import math
result = math.exp(1000)Error output
OverflowError: math range error
How to fix it
Use Python's decimal module with sufficient precision for very large or very precise calculations. Check input ranges before passing them to math functions. For integers, Python handles arbitrary precision natively so overflow only affects float operations.
Fixed code
import math
from decimal import Decimal
# Use Python's arbitrary-precision integers or Decimal for big numbers
x = 1000
try:
result = math.exp(x)
except OverflowError:
result = Decimal(x).exp()
print(result)Related errors
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