How to use the strconv.ParseComplex() function in Go
Maria ElijahThe strconv.ParseComplex() function
The ParseComplex() function is a strconv package inbuilt function that converts a string s to a complex number with the precision defined by bitSize.
Note: The value of
bitSizemust be 64 or 128. 64 is used forcomplex64, and 128 is used forcomplex128.
Syntax
func ParseComplex(s string, bitSize int) (complex128, error)
Parameters
-
s: The string value to be converted to a complex number. -
bitSize: It is used to specify the precision. The value can be 64 or 128.
Return value
The strconv.ParseComplex() function returns the complex number converted from the given string.
Example
The following code shows how to implement the strconv.ParseComplex() function in Go.
// Golang program
// using strconv.ParseComplex() Function
package main
import (
"fmt"
"strconv"
)
func main() {
// function converts the str variable
// to a complex number with the precision
// defined by bitSize.
// declare variable str as string
var str string
// assign value
str = "2-3i"
// function converts the str variable
// to a complex number with the precision
// defined by bitSize.
// then display result
fmt.Println(strconv.ParseComplex(str, 64))
fmt.Println(strconv.ParseComplex(str, 128))
fmt.Println()
// reassign value
str = "√5 + √2i"
// function converts the str variable
// to a complex number with the precision
// defined by bitSize.
// then display result
fmt.Println(strconv.ParseComplex( str, 64))
fmt.Println(strconv.ParseComplex(str, 128))
fmt.Println()
// reassign value
str = "2.56+3.192i"
// function converts the str variable
// to a complex number with the precision
// defined by bitSize.
// then display result
fmt.Println(strconv.ParseComplex(str, 64))
fmt.Println(strconv.ParseComplex(str, 128))
}
Explanation
-
Line 4: We add the
mainpackage. -
Line 6–9: We import the necessary packages.
-
Line 11–21: We define the
main()function, variablestrof string type and assign a value to it. We pass the variable to theParseComplex()function which converts thestrvariable to a complex number with the precision defined bybitSize. Finally, we display the result.
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