Python math.trunc() – Truncate Decimal Part

Python math.trunc()

math.trunc(x) function truncates the decimal value and returns the real or integral value of x.

Syntax

The syntax to call trunc() function is

math.trunc(x)

where

Parameter	Required	Description
x	Yes	A numeric value.

If x is infinity, then trunc(x) raises OverflowError.

If x is nan, then trunc(x) raises ValueError.

Examples

Truncate x = 3.1415 using math.trunc().

Python Program

import math

x = 3.1415
result = math.trunc(x)
print('trunc(x) :', result)

Run

Output

trunc(x) : 3

Truncate negative value, x = -3.1415, using math.trunc().

Python Program

import math

x = -3.1415
result = math.trunc(x)
print('trunc(x) :', result)

Run

Output

trunc(x) : -3

Truncate x = infinity.

Python Program

import math

x = math.inf
result = math.trunc(x)
print('trunc(x) :', result)

Run

Output

OverflowError: cannot convert float infinity to integer

Truncate an integer.

Python Program

import math

x = 3
result = math.trunc(x)
print('trunc(x) :', result)

Run

Output

trunc(x) : 3

Truncate x = NaN.

Python Program

import math

x = math.nan
result = math.trunc(x)
print('trunc(x) :', result)

Run

Output

ValueError: cannot convert float NaN to integer

Summary

In this Python Examples tutorial, we learned the syntax of, and examples for math.trunc() function.