number parsing example
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src/xx-number-parsing.go
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34
src/xx-number-parsing.go
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// Number parsing
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package main
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import (
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"fmt"
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"strconv" // Package `strconv` provides number parsing.
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)
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func main() {
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f, _ := strconv.ParseFloat("1.234", 64) // `64` tells how many bits of precision to parse.
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fmt.Println(f)
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i, _ := strconv.ParseInt("123", 0, 64) // `0` means infer the base from the string.
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println(i) // `64` requires that the result fit in 64 bits.
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d, _ := strconv.ParseInt("0x1b3e", 0, 64) // `ParseInt` will recognize hex-formatted numbers.
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println(d)
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k, _ := strconv.Atoi("456") // `Atoi` is a convenienice function for `int` parsing.
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println(k)
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_, e := strconv.Atoi("wat") // Parse functions return an error on bad input.
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fmt.Println(e)
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}
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/*
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$ go run xx-number-parsing.go
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1.234
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123
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6974
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456
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strconv.ParseInt: parsing "wat": invalid syntax
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*/
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package main
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import ("fmt"; "strconv")
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func main() {
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b, _ := strconv.ParseBool("true")
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fmt.Println(b)
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f, _ := strconv.ParseFloat("1.234", 64)
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fmt.Println(f)
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i, _ := strconv.ParseInt("123", 0, 64)
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fmt.Println(i)
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d, _ := strconv.ParseInt("0x1b3e", 0, 64)
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fmt.Println(d)
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k, _ := strconv.Atoi("456")
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fmt.Println(k)
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}
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