Parse Integer from String
Examples
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Parsing numbers from strings is a basic but common task in many programs; here’s how to do it in Go.
package main
import (
"fmt"
"strconv"
)
func main() {
// With ParseFloat, this 64 tells how many bits of precision to parse.
f, _ := strconv.ParseFloat("1.234", 64)
fmt.Println(f)
// For 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 hex-formatted numbers.
d, _ := strconv.ParseInt("0x1c8", 0, 64)
fmt.Println(d)
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)
_, e := strconv.Atoi("wat")
fmt.Println(e)
}