The Go Programming Language

2.4 Assignments

The value held by a variable is updated by an assignment statement, which in its simplest form has a variable on the left of the = sign and an expression on the right.

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x = 1                       // named variable
*p = true                   // indirect variable
person.name = "bob"         // struct field
count[x] = count[x] * scale // array or slice or map element

Each of the arithmetic and bitwise binary operators has a corresponding assignment operator allowing, for example, the last statement to be rewritten as

count[x] *= scale

which saves us from having to repeat (and re-evaluate) the expression for the variable.

Numeric variables can also be incremented and decremented by ++ and -- statements:

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