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- Scheme Procedure:
**make-rectangular***real_part imaginary_part* - C Function:
**scm_make_rectangular***(real_part, imaginary_part)* Return a complex number constructed of the given

`real-part`and`imaginary-part`parts.

- Scheme Procedure:
**make-polar***mag ang* - C Function:
**scm_make_polar***(mag, ang)* -
Return the complex number

`mag`* e^(i *`ang`).

- Scheme Procedure:
**real-part***z* - C Function:
**scm_real_part***(z)* Return the real part of the number

`z`.

- Scheme Procedure:
**imag-part***z* - C Function:
**scm_imag_part***(z)* Return the imaginary part of the number

`z`.

- Scheme Procedure:
**magnitude***z* - C Function:
**scm_magnitude***(z)* Return the magnitude of the number

`z`. This is the same as`abs`

for real arguments, but also allows complex numbers.

- Scheme Procedure:
**angle***z* - C Function:
**scm_angle***(z)* Return the angle of the complex number

`z`.

- C Function:
*SCM***scm_c_make_rectangular***(double re, double im)* - C Function:
*SCM***scm_c_make_polar***(double x, double y)* Like

`scm_make_rectangular`

or`scm_make_polar`

, respectively, but these functions take`double`

s as their arguments.

- C Function:
*double***scm_c_real_part***(z)* - C Function:
*double***scm_c_imag_part***(z)* Returns the real or imaginary part of

`z`as a`double`

.

- C Function:
*double***scm_c_magnitude***(z)* - C Function:
*double***scm_c_angle***(z)* Returns the magnitude or angle of

`z`as a`double`

.