scalbn() function in C++
The scalbn() function is defined in the cmath header file. This function is used to calculate the product of given number x and FLT_RADIX raised to the power n.
Syntax:-
float scalbn(float x, int n);
or
double scalbn(double x, int n);
or
long double scalbn(long double x, int n);
or
double scalbn(integral x, int n);
Parameters:- This method takes two parameters:
- x: This represents the value of significand.
- n: This represents the value of the exponent.
Return Value: This function returns the product of given number x and FLT_RADIX raised to the power n. with the help of formula:
scalbn(x, n) = x * FLT_RADIXn
Below programs illustrate the above function:-
Example 1:-
// C++ program to demonstrate // example of scalbn() function. #include <bits/stdc++.h> using namespace std; int main() { int n = 7; int x = 5; int ans; ans = scalbn(x, n); cout << x << " * " << FLT_RADIX << "^" << n << " = " << ans << endl; return 0; } |
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Output:
5 * 2^7 = 640
Example 2:-
// C++ program to demonstrate // example of scalbn() function. #include <bits/stdc++.h> using namespace std; int main() { int n = 7; double x = 3.9; int ans; ans = scalbn(x, n); cout << x << " * " << FLT_RADIX << "^" << n << " = " << ans << endl; return 0; } |
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Output:
3.9 * 2^7 = 499
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