Finding the Decimal Logarithm of Complex Number in Golang

• Last Updated : 27 Mar, 2020

Go language provides inbuilt support for basic constants and mathematical functions for complex numbers with the help of the cmplx package. You are allowed to find the decimal logarithm of the specified complex number with the help of Log10() function provided by the math/cmplx package. So, you need to add a math/cmplx package in your program with the help of the import keyword to access the Log10() function.

Syntax:

`func Log10(y complex128) complex128`

Example 1:

 `// Golang program to illustrate how to find the``// decimal logarithm of the given complex number`` ` `package main`` ` `import (``    ``"fmt"``    ``"math/cmplx"``)`` ` `// Main function``func main() {`` ` `    ``// Finding decimal logarithm of``    ``// the specified complex number``    ``// Using Log10() function``    ``res_1 := cmplx.Log10(1i)``    ``res_2 := cmplx.Log10(-4 + 12i)``    ``res_3 := cmplx.Log10(-3 - 9i)`` ` `    ``// Displaying the result``    ``fmt.Printf(``"Result 1: %.1f"``, res_1)``    ``fmt.Printf(``"\nResult 2: %.1f"``, res_2)``    ``fmt.Printf(``"\nResult 3: %.1f"``, res_3)``}`

Output:

```Result 1: (0.0+0.7i)
Result 2: (1.1+0.8i)
Result 3: (1.0-0.8i)
```

Example 2:

 `// Golang program to illustrate how to find the``// decimal logarithm of the given complex number`` ` `package main`` ` `import (``    ``"fmt"``    ``"math/cmplx"``)`` ` `// Main function``func main() {`` ` `    ``cnumber_1 := complex(0, 2)``    ``cnumber_2 := complex(4, 6)`` ` `    ``// Finding decimal logarithm``    ``cvalue_1 := cmplx.Log10(cnumber_1)``    ``cvalue_2 := cmplx.Log10(cnumber_2)`` ` `    ``// Sum of the given values``    ``res := cvalue_1 + cvalue_2`` ` `    ``// Displaying results``    ``fmt.Println(``"Complex Number 1: "``, cnumber_1)``    ``fmt.Printf(``"Decimal logarithm 1: %.1f"``, cvalue_1)`` ` `    ``fmt.Println(``"\nComplex Number 2: "``, cnumber_2)``    ``fmt.Printf(``"Decimal logarithm 2: %.1f "``, cvalue_2)``    ``fmt.Printf(``"\nSum : %.1f"``, res)`` ` `}`

Output:

```Complex Number 1:  (0+2i)
Decimal logarithm 1: (0.3+0.7i)
Complex Number 2:  (4+6i)
Decimal logarithm 2: (0.9+0.4i)
Sum : (1.2+1.1i)
```

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