C++ Math trunc() Function

C++ Math trunc() Function with tutorial for beginners and professionals with examples on isgreaterequal(), less(), islessequal(), islessgreater(), isunordered(), exp(), frexp(), ldexp(), log(), log10(), modf(), exp2(), expm1(), log1p(), log2(), logb(), scalbn(), scalbln() etc.

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C++ Math trunc()

The function rounds off the given value towards zero and returns the nearest integral value whose magnitude is not greater than the given value.

For example:

trunc(3.8) = 3;

Syntax

Suppose a number is 'x'. Syntax would be :

return_type trunc(data_type x);

Note: return_type can be float,double or long double.

Parameter

x: The value that can be float,double or long double.

Return value

It returns a rounded value of x.

Example 1

Let's see a simple example when the value of x is positive.

#include 
#include
using namespace std;
int main()
{
    float x=8.8;
    std::cout << "The value of x is :" <

Output:

The value of x is :8.8
Truncated value of x is :8

Example 2

Let's see a simple example when the value of x is negative.

#include 
#include
using namespace std;
int main()
{
    double x=-3.9;
    std::cout << "The value of x is :" <

Output:

The value of x is :-3.9
Truncated value of x is:-3

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