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''unique_ptr'' Instances Level Order Traversal in Spiral form Problem with scanf() when there is fgets()/gets()/scanf() After it BFS Code in C++ Create Linked List In C++ Function Overloading in C++ std::minmax() and std::minmax_element() in C++ STL multimap::emplace_hint() Function in C++ STL Multimap find() in C++ STL Multiple Comparisons in a C++ Priority Queue Name Mangling and Extern C in C++ Concept Parameterised Constructor in C++ Remove Duplicates from Sorted Array in C++ Returning Multiple Values from a Function using Tuple and Pair in C++ Scope Resolution Operator vs this Pointer Set a variable without using Arithmetic, Relational or Conditional Operator C++ Program To Sort An Array In Descending Order Timsort Implementation Using C++ What Happens When We Exceed Valid Range of Built-in Data Types in C++ Naked Function Calls in C++ What is operator overloading in C++ Simple Car Racing Game Code in C++ SJF CPU Scheduling Program in C++ Virtual functions and runtime polymorphism 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C++ Math exp2()

The function computes the base - 2 exponential function of a given number.

Suppose a number is 'x':

Syntax

float exp2(float x);
double exp2(double x);
long double exp2(long double x);
double exp2(integral x);

Parameter

x: It is the value of the exponent.

Return value

It returns, 2 raised to the power x.

Example 1

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

#include <iostream>
#include<math.h>
using namespace std;
int main()
{
 int x= 4;
 std::cout << "Value of x is : " <<x <<std::endl;
 cout<<"exp2(x) = "<<exp2(4);
 return 0;
}

Output:

Value of x is : 4
exp2(x) = 16

Example 2

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

#include <iostream>
#include<math.h>
using namespace std;
int main()
{
 int x= -2;
 std::cout << "Value of x is : " <<x <<std::endl;
 cout<<"exp2(x) = "<<exp2(x);
 return 0;
}

Output:

Value of x is : -2
exp2(x) = 0.25

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