By Jon Jagger
Criteria, whereas being definitive, don't frequently function the simplest connection with using a programming language. Books on languages are likely to be capable of clarify utilization greater, yet lack the definitive precision of a typical. This booklet combines the 2; it's the ordinary with further explanatory fabric. * Written through individuals of the criteria committee* Annotates the traditional with functional implementation suggestion* The definitive connection with the C# foreign regular
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For programs that don’t need int values to act like objects, int values are simply 32-bit values. For programs that need int values to behave like objects, this capability is available on demand. This ability to treat value types as objects bridges the gap between value types and reference types that exists in most languages. For example, a Stack class can provide Push and Pop methods that take and return object values. } } Because C# has a unified type system, the Stack class can be used with elements of any type, including value types like int.
Both “rectangular” and “jagged” arrays are supported. Single-dimensional arrays are the most common type. WriteLine("arr[{0}] = {1}", i, arr[i]); } } creates a single-dimensional array of int values, initializes the array elements, and then prints each of them out. The output produced is: arr[0] = 0 arr[1] = 1 arr[2] = 4 arr[3] = 9 arr[4] = 16 The type int[]used in the previous example is an array type. Array types are written using a non-array-type followed by one or more rank specifiers. The example class Test { static void Main() { int[] a1; // single-dimensional array of int 20 CHAPTER 8: LANGUAGE OVERVIEW int[,] a2; int[,,] a3; // 2-dimensional array of int // 3-dimensional array of int int[][] j2; int[][][] j3; // "jagged" array: array of (array of int) // array of (array of (array of int)) } } shows a variety of local variable declarations that use array types with int as the element type.
Two expressions of type object are considered equal if both refer to the same object, or if both are null. Two expressions of type string are considered equal if the string instances have identical lengths and identical characters in each character position, or if both are null. WriteLine((object)s == (object)t); } } produces the output True False because the first comparison compares two expressions of type string, and the second comparison compares two expressions of type object. 2 Conversions The predefined types also have predefined conversions.