| // Copyright 2015 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // Package strconv implements conversions to and from string representations |
| // of basic data types. |
| // |
| // Numeric Conversions |
| // |
| // The most common numeric conversions are Atoi (string to int) and Itoa (int to string). |
| // |
| // i, err := strconv.Atoi("-42") |
| // s := strconv.Itoa(-42) |
| // |
| // These assume decimal and the Go int type. |
| // |
| // ParseBool, ParseFloat, ParseInt, and ParseUint convert strings to values: |
| // |
| // b, err := strconv.ParseBool("true") |
| // f, err := strconv.ParseFloat("3.1415", 64) |
| // i, err := strconv.ParseInt("-42", 10, 64) |
| // u, err := strconv.ParseUint("42", 10, 64) |
| // |
| // The parse functions return the widest type (float64, int64, and uint64), |
| // but if the size argument specifies a narrower width the result can be |
| // converted to that narrower type without data loss: |
| // |
| // s := "2147483647" // biggest int32 |
| // i64, err := strconv.ParseInt(s, 10, 32) |
| // ... |
| // i := int32(i64) |
| // |
| // FormatBool, FormatFloat, FormatInt, and FormatUint convert values to strings: |
| // |
| // s := strconv.FormatBool(true) |
| // s := strconv.FormatFloat(3.1415, 'E', -1, 64) |
| // s := strconv.FormatInt(-42, 16) |
| // s := strconv.FormatUint(42, 16) |
| // |
| // AppendBool, AppendFloat, AppendInt, and AppendUint are similar but |
| // append the formatted value to a destination slice. |
| // |
| // String Conversions |
| // |
| // Quote and QuoteToASCII convert strings to quoted Go string literals. |
| // The latter guarantees that the result is an ASCII string, by escaping |
| // any non-ASCII Unicode with \u: |
| // |
| // q := strconv.Quote("Hello, 世界") |
| // q := strconv.QuoteToASCII("Hello, 世界") |
| // |
| // QuoteRune and QuoteRuneToASCII are similar but accept runes and |
| // return quoted Go rune literals. |
| // |
| // Unquote and UnquoteChar unquote Go string and rune literals. |
| // |
| package strconv |
