What is difference between addition assignment operator and plus operator with blank string?
minus operator in c#
subtract operator in c#
I have a code as below:
var point = ''; point = '' + 12 + 34; console.log(point); // output = 1234
The difference is grouping. This:
point += + 12 + 34;
is equivalent to:
// v-----------v---- note grouping point = point + ( + 12 + 34 ); // ^--- unary
+ is a unary
+ which doesn't do anything there since
12 is already a number. So we have:
point = point + ( 12 + 34 );
point = point + 46;
point starts out being
"46" (a string).
In the first case, this is what happens:
'' + 12 --> '12'(notice that now we have a string, as opposed to a number)
'34'in order to evaluate the expression
Instead, this is what happens in the second case:
+12 --> 12unary operator applied to the number
12, nothing happens
12 + 34 --> 46pretty standard sum
'' + 46 --> '46'empty string summed to the number
46, which results in the string
What does '+=' mean in C programming?, . It is essentially a shorthand notation for incrementing the variable on the left by an arbitrary value on the right. The following two lines of C code are identical, in terms of their effect on the variable z: z = z + y; // increment z by y. For information about the arithmetic + operator, see the Unary plus and minus operators and Addition operator + sections of the Arithmetic operators article. String concatenation. When one or both operands are of type string, the + operator concatenates the string representations of its operands (the string representation of null is an empty string):
Per Addition Assignment Operator...
Using this operator is exactly the same as specifying:
result = result + expression.
Your expression is
+12 + 34, which evaluates to the integer
point = point + expression point = point + (+12 + 34) point = point + 46 point = "" + 46 point = "46"
You may notice that in the final step,
"" combined with
46 gave us a string
"46". Again, per the aforementioned documentation...
The types of the two expressions determine the behavior of the += operator:
If Then --- --- Both expressions are numeric or Boolean Add Both expressions are strings Concatenate One expression is numeric and the other is a string Concatenate
This would be an example of the third case. One expression is numeric (
46) and the other is a string (
""), so these two values concatenate to
What is the difference between = (Assignment) and == (Equal to , checks whether the two given operands are equal or not. If so, it returns true. Otherwise it returns false. The addition assignment operator adds the value of the right operand to a variable and assigns the result to the variable. The types of the two operands determine the behavior of the addition assignment operator. Addition or concatenation is possible. See the addition operator for more details.
What do these ( += , -= , *= , /= ) Operators Mean?, String concatenation; Delegate combination; Addition assignment operator +=; Operator For information about the arithmetic + operator, see the Unary plus and minus of its operands (the string representation of null is an empty string):. C# This post shows the assignment, arithmetic and unary operators available in Java. Assignment operator in Java It assigns the value on its right to the operand on its left.
+ and += operators, They are things like addition + , multiplication * , subtraction - , and so on. String concatenation and conversion is a special feature of the binary plus + . The unary plus or, in other words, the plus operator + applied to a Let's note that an assignment = is also an operator. Is there any difference? Yes Basic Operators¶. An operator is a special symbol or phrase that you use to check, change, or combine values. For example, the addition operator (+) adds two numbers, as in let i = 1 + 2, and the logical AND operator (&&) combines two Boolean values, as in if enteredDoorCode && passedRetinaScan.
Operators, Not surprisingly, strings belong to the type str and integers belong to the type int. Assignment operators link a name, on the left hand side of the operator, with a value, Addition, subtraction, multiplication, and exponentiation all do what you expect, The difference between the left and right hand sides of the assignment Using an lvalue of volatile-qualified non-class type as left operand of built-in direct assignment operator is deprecated, unless the assignment expression appears in an unevaluated context or is a discarded-value expression.
+). That's life.
- More about the use of assignment operator as I understand it... ecma-international.org/ecma-262/6.0/…
- avoid making a code sample format to the text that are not a code. Use CTRL+K to make your code to be a code sample format.