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This e-book is a quick, concise creation to machine programming utilizing the language cross. Designed via Google, pass is a common function programming language with glossy positive factors, fresh syntax and a powerful well-documented universal library, making it a great language to profit as your first programming language.
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Extra resources for An Introduction To Programming in Go
This expression is made up of three parts: the numeric literal 1 (which is of type int), the + operator (which represents addition) and another numeric literal 1. 0 to tell Go that this is a float- 29 Types ing point number instead of an integer. Running this program will give you the same result as before. 2 Strings As we saw in chapter 2 a string is a sequence of characters with a definite length used to represent text. Go strings are made up of individual bytes, usually one for each character.
1] gives you the 2nd element not the 1st. Also notice that you see 101 instead of e when you run this program. This is because the character is represented by a byte (remember a byte is an integer). 31 Types One way to think about indexing would be to show it like this instead: "Hello World"1. You'd read that as “The string Hello World sub 1,” “The string Hello World at 1” or “The second character of the string Hello World”. 3. Concatenation uses the same symbol as addition. The Go compiler figures out what to do based on the types of the arguments.
Like integers floating point numbers have a certain size (32 bit or 64 bit). Using a larger sized floating point number increases it's precision. (how many digits it can represent) 3. In addition to numbers there are several other values which can be represented: “not a number” (NaN, for things like 0/0) and positive and negative infinity. (+∞ and −∞) Go has two floating point types: float32 and float64 (also often referred to as single precision and double precision respectively) as well as two additional types for representing complex numbers (numbers with imaginary parts): complex64 and complex128.