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14. Strings
String Types
String Types are used to store text like data.A string is an immutable sequence of bytes.
Go uses UTF-8 encoding to store strings.
A character in UTF8 can be from 1 to 4 bytes long. UTF-8 can represent any character in the Unicode standard. UTF-8 is backwards compatible with ASCII. UTF-8 is the preferred encoding for e-mail and web pages - W3Schools.com
Declaring String
Strings are declared using one of the following ways:
main.go
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var str1 string = "Hello, World!"
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var str2 = "Hello, World!"
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str3 := "Hello, World!"
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Zero value for string is empty string
""Length of string
Build in
len function can be used to get number of bytes in stringmain.go
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fmt.Printf("length of str1 is %d \n", len(str1))
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Sub-string operation
We can easily create substring from existing string using
s[i,j].This operation always generates new string since string are immutable. i indicates starting index for substring including i and j indicates end index excluding jmain.go
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str4 := str1[7:13]
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fmt.Println(str4)
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Blog Posts
Strings, bytes, runes and characters in Go - go.dev
Last modified 2yr ago