52_number_parsing.go

package gobyexample

import (
	"fmt"
	"strconv"
)

// NumberParsingDemo - demonstrates number parsing
func NumberParsingDemo() {
	// With `ParseFloat`, this 64 indicates how many
	// bits of precision to parse
	f, _ := strconv.ParseFloat("1.234", 64)
	fmt.Println(f)

	// With `ParseInt`, the 0 means infer the base from
	// the string. 64 requires that the result fit in 64 bits.
	i, _ := strconv.ParseInt("123", 0, 64)
	fmt.Println(i)

	// `ParseInt` will recognize hexadecimal numbers.
	d, _ := strconv.ParseInt("0x1c8", 0, 64)
	fmt.Println(d)

	// A `ParseUint` is also available.
	u, _ := strconv.ParseUint("789", 0, 64)
	fmt.Println(u)

	// `Atoi` is a convenience function for basic base-10 int parsing.
	k, _ := strconv.Atoi("135")
	fmt.Println(k)

	// Parse functions return an error on bad input.
	_, e := strconv.Atoi("wot")
	fmt.Println(e)
}