# How do you find the real part of a complex function?

## How do you find the real part of a complex function?

In a complex number z=a+bi , a is called the “real part” of z and b is called the “imaginary part.” If b=0 , the complex number is a real number; if a=0 , then the complex number is “purely imaginary.”

### How do you get imaginary part of complex number in Fortran?

In Fortran 2008, you can use designator %IM to access the imaginary part of complex numbers directly; for instance, Z%IM has the same value as AIMAG(Z).

#### What is complex function in Fortran?

8.71 COMPLEX — Complex conversion function Description: COMPLEX(X, Y) returns a complex number where X is converted to the real component and Y is converted to the imaginary component.

**What is real number in Fortran?**

Fortran can use also scientific notation to represent real numbers. The sequence “En” attached to the end of a number, where n is an integer, means that the number is to be multiplied by 10n. Here are various ways of writing the number 12.345: 1.2345E1 , .

**What is the real part of the function?**

Most text books write f(z)= u+ iv so that u is the real part and v the imaginary part of f: is z= x+ iy then u(x,y) and v(x,y) are real valued functions of the real variables of x and y.

## How do I use complex numbers in Fortran?

ADDITION: Two complex numbers are added simply by adding to-gather their real parts and imaginary parts: For example, (3 + 2i) + (4 − 6i) = (7 − 4i). MULTIPLICATION:. For example, we will have (2 + 3i) (4 + 5i) = 2(4 + 5i) + 3i(4 + 5i) = 8 + 10i + 12i + 15i2 = 8 + 10i + 12i − 15 = −7 + 22i .

### How do you write complex in Fortran?

A complex number has two parts : the real part and the imaginary part. Two consecutive numeric storage units store these two parts. The generic function cmplx() creates a complex number. It produces a result who’s real and imaginary parts are single precision, irrespective of the type of the input arguments.

#### How do I format a real number in Fortran?

Fortran formats are used to control the appearance of the input and output….We shall use the following convention of symbols:

- w: the number of positions to be used.
- m: the minimum number of positions to be used.
- d: the number of digits to the right of the decimal point.
- e: the number of digits in the exponent part.

**How do you define a complex variable in Fortran?**

Fortran allows variables to be declared as complex numbers. Variables such as this are declared with their first value as the real component and the second as the imaginary. The following statements show an example of a complex variable declaration in a portion of a program.

**What is real part?**

Definition of real part : the term in a complex number (such as 2 in 2 + 3i) that does not contain the imaginary unit as a factor.