Update README.md

Author: sriksun

README.md

@@ -52,21 +52,53 @@ Step 4: Evaluate the expression
 ```
 ### Simple assignment expressions - overwriting variable value
 ```
-"a++"              //Assign value of post increment expression
-"a--"              //Assign value of post decrement expression 
-"--a"              //Assign value of pre decrement expression 
-"++a"              //Assign value of pre increment expression 
-"a+=1"             //Assign value of add expression 
-"a-=1"             //Assign value of substract expression 
-"a*=2"             //Assign value of multiply expression 
-"a/=2"             //Assign value of divide expression
-"a%=2"             //Assign value of modulo expression 
-"a<<=1"            //Assign value of left-shift expression 
-"a>>=1"            //Assign value of right-shift expression 
-"a&=7"             //Assign value of bitwise-and expression  
-"a|=7"             //Assign value of bitwise-or expression
-"a^=7"             //Assign value of bitwise-xor expression
-"a=(a+7)".         //Assign value of a simple expression
-"a=(a+(Int16)7)"   //Assign value of a complex expression 
-"a=Int32.MaxValue" //Assign a constant value
+"a++"              //Assign value of variable 'a' with post increment expression
+"a--"              //Assign value of variable 'a' with post decrement expression 
+"--a"              //Assign value of variable 'a' with pre decrement expression 
+"++a"              //Assign value of variable 'a' with pre increment expression 
+"a+=1"             //Assign value of variable 'a' with add expression 
+"a-=1"             //Assign value of variable 'a' with substract expression 
+"a*=2"             //Assign value of variable 'a' with multiply expression 
+"a/=2"             //Assign value of variable 'a' with divide expression
+"a%=2"             //Assign value of variable 'a' with modulo expression 
+"a<<=1"            //Assign value of variable 'a' with left-shift expression 
+"a>>=1"            //Assign value of variable 'a' with right-shift expression 
+"a&=7"             //Assign value of variable 'a' with bitwise-and expression  
+"a|=7"             //Assign value of variable 'a' with bitwise-or expression
+"a^=7"             //Assign value of variable 'a' with bitwise-xor expression
+"a=(a+7)".         //Assign value of variable 'a' with a simple expression
+"a=(a+(Int16)7)"   //Assign value of variable 'a' with a complex expression 
+"a=Int32.MaxValue" //Assign a constant value to variable 'a'. Is also an example of Field or property access on exported type. Requires Int32 to be added to exported type
 ```
+### Simple logical expressions
+```
+"a < 7"           //Compare < between variable 'a' and int constant
+"a <= 7"          //Compare <= between variable 'a' and int constant
+"a == 6"          //Compare for equality between variable 'a' and int constant
+"a != 6"          //Compare for not equal between variable 'a' and int constant
+"a > 7"           //Compare > between variable 'a' and int constant
+"a >= 7"          //Compare >= between variable 'a' and int constant
+"a && 7"          //Logical and between variable 'a' and int constant
+"a || 0"          //Logical or between variable 'a' and int constant
+"true && true".   //Logical and between boolean constants
+"true || false".  //Logical or between boolean constants
+"a >= 7000000000" //Compare variable 'a' (int) with long constant
+```
+### Object creation expression
+```
+"new DateTime(50000000000)"   //Create a new instance of DateTime based on Ticks (long). Requires DateTime to be added to ExportedTypes in Context
+"a=new DateTime(50000000000)" //Create a new instance of DateTime and assign to variable 'a'. Requires DateTime to be added to ExportedTypes in Context
+```
+### Method invocation expression
+```
+"a.AddTicks((Int64)100)".  //Invokes method of variable (or on Exported Type)
+"a=a.AddTicks((Int64)100)" //Invokes method of variable and assign value to variable 'a'
+"Int32.Parse(\"100\")".    //Invokes method on exported type. Requires Int32 to be added to ExportedTypes in Context
+```
+### Other complex example expression
+```
+"String.Concat(obj[\"channel\"][\"item\"][0][\"title\"].ToString().Substring(0,8), suffix)" //Operates on variable 'obj' of type JObject and 'suffix' of type String
+"Int32.Parse(((Int32)Math.Sqrt(a * a * 1.0)).ToString()) == 5" //Operates on variable 'a' of type int
+```
+### Reference - Test Cases
+[Functional Tests](https://github.com/sriksun/ExpressionEvaluator/blob/main/ExpressionEvaulatorTests/FunctionalTests.cs)