Wikipedia: Variable
Variables are declared and initialized with :=. Tengo is dynamically typed: a variable can hold any value and be reassigned to a different type.
fmt := import("fmt")message := "hello"
fmt.println(message)message = "world"
fmt.println(message)x := 10
y := 20
fmt.println("sum: ", x+y)value := 42
fmt.println(value)
value = "now a string"
fmt.println(value)try it
hello world sum: 30 42 now a string