Merge pull request #64 from tsingbx/integers

add doc for integers

Author: xushiwei

107-Integers/integers.gop

@@ -1 +1,33 @@
+// int type represents a whole number, which can be positive or negative. The
+// int type size is platform-dependent and will be either 32 or 64 bits. There are
+// also integer types that have a specific size, such as int8, int16, int32, int64, and
+// int128, but the int type should be used unless you need a specific size.
+//
+// uint type represents a positive whole number. The uint type size is platformdependent and will be either 32 or 64 bits. There are also unsigned integer
+// types that have a specific size, such as uint8, uint16, uint32, uint64 and uint128, but
+// the uint type should be used unless you need a specific size.
+//
+// For int 20 values can also be expressed in hex (0x14), octal (0o24), and binary notation (0b0010100).
+// uint, there are no uint literals. All literal whole numbers are treated as int values.
+//
+// Go+ also supports writing numbers with _ as separator and also support cast bool to number types.
+// As example shows
 
+num := 1_000_000 //Go+ support, same as 1000000
+println num
+
+println int(true)       //Go+ support cast bool to int
+println float64(true)   //and to float64
+println complex64(true) //and to complex64, and so on.
+
+println 20+20
+println 20+30
+println 0x14      //in hex
+println 0o24      //in octal
+println 0b0010100 // binary
+
+c := int128(12345) // If you want a different type of integer, you can use casting.
+println c
+
+u128 := uint128(12345)
+println(u128)