totn C Functions

C Language: ldexp function
(Combine Fraction and Exponent)

In the C Programming Language, the ldexp function combines a fraction and an exponent into a floating-point value.

Syntax

The syntax for the ldexp function in the C Language is:

double ldexp(double fraction, int exp);

Parameters or Arguments

fraction
The fractional part of the value.
exp
The exponent part of the value.

Returns

The ldexp function returns a floating-point value combining a fraction and an exponent based on the equation: fraction x 2 exponent

Required Header

In the C Language, the required header for the ldexp function is:

#include <math.h>

Applies To

In the C Language, the ldexp function can be used in the following versions:

  • ANSI/ISO 9899-1990

ldexp Example

/* Example using ldexp by TechOnTheNet.com */

#include <stdio.h>
#include <math.h>

int main(int argc, const char * argv[])
{
    /* Define temporary variables */
    double value;
    int e;
    double result;

    /* Assign the value and exponential we will use to find the ldexp */
    value = 1.5;
    e = 2;

    /* Calculate the ldexp of the value and the exponential */
    result = ldexp(value, e);

    /* Display the result of the calculation */
    printf("The ldexp of %f with exponential %d is %f\n", value, e, result);

    return 0;
}

When compiled and run, this application will output:

The ldexp of 1.500000 with exponential 2 is 6.000000

Similar Functions

Other C functions that are similar to the ldexp function:

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