Parsefloat give output in scientific format in golang - go

Question

i am trying to parse this string "7046260" using Parsefloat function in golang , but i am getting output in scientific format 7.04626e+06. i want the output in the format 7046260. how to get this?
package main
import (
"fmt"
"strconv"
)
func main() {
Value := "7046260"
Fval, err := strconv.ParseFloat(Value, 64)
if err == nil {
fmt.Println(Fval)
}
}
ouput :- 7.04626e+06

Answer 1

Parsefloat give output in scientific format in golang
i am trying to parse this string "7046260" using Parsefloat function in golang , but i am getting output in scientific format 7.04626e+06. i want the output in the format 7046260
You're confusing the floating-point value's (default) formatted output with its internal representation.
ParseFloat is working fine.
You just need to specify an output format:
See the fmt package documentation.
Use Printf to specify a format-string.
Use the format %.0f to instruct Go to print the value as-follows:
% marks the start of a placeholder.
. denotes default width (i.e. don't add leading or trailing zeroes).
0 denotes zero radix precision (i.e. don't print any decimal places, even if the value has them)
f denotes the end of the placeholder, and that the placeholder is for a floating-point value.
I have a few other recommendations:
Local variables in Go should use camelCase, not PascalCase. Go does not encourage the use of snake_case.
You should check err != nil after each nil-returning function returns and either fail-fast (if appropriate), pass the error up (and optionally log it), or handle it gracefully.
When working with floating-point numbers, you should be aware of NaN's special status. The IsNaN function is the only way to correctly check for NaN values (because ( aNaNValue1 == math.NaN ) == false).
The same applies in all languages that implement IEEE-754, including Java, JavaScript, C, C#.NET and Go.
Like so:
package main
import (
"fmt"
"strconv"
"math"
"log"
)
func main() {
numberText := "7046260"
numberFloat, err := strconv.ParseFloat(numberText, 64)
if err != nil {
log.Fatal(err)
}
if math.IsNaN(numberFloat) {
log.Fatal("NaN value encountered")
}
fmt.Printf("%.0f",numberFloat)
fmt.Println()
}