What is the comma operator in C++?
In the C and C++ programming languages, the comma operator (represented by the token , ) is a binary operator that evaluates its first operand and discards the result, and then evaluates the second operand and returns this value (and type); there is a sequence point between these evaluations.
Why comma is used in C++?
The purpose of comma operator is to string together several expressions. The value of a comma-separated list of expressions is the value of the right-most expression. Essentially, the comma’s effect is to cause a sequence of operations to be performed.
How do you use a comma operator?
The comma operator ( , ) evaluates each of its operands (from left to right) and returns the value of the last operand. This lets you create a compound expression in which multiple expressions are evaluated, with the compound expression’s final value being the value of the rightmost of its member expressions.
Where is comma operator used in C?
The comma operator in c comes with the lowest precedence in the C language. The comma operator is basically a binary operator that initially operates the first available operand, discards the obtained result from it, evaluates the operands present after this, and then returns the result/value accordingly.
What is comma and sizeof operator?
The comma operator has no special meaning to sizeof . sizeof(b, a) examines the complete expression (b, a) , works out the resultant type, and computes the size of that type without actually evaluating (b , a) .
What does a comma mean in a function?
The comma is used in mathematics to divide long numbers into smaller units, aiding in the identification of place value. In a number that is separated into short segments, the comma is a numeric symbol rather than a mark of punctuation. Consequently, there should be no space before or after the mathematical comma.
Can we use comma in if statement?
Use a comma after the if-clause when the if-clause precedes the main clause. If I’d had time, I would have cleaned the house. If the main clause precedes the if-clause, no punctuation is necessary.
What is sizeof in C++?
The sizeof is a keyword, but it is a compile-time operator that determines the size, in bytes, of a variable or data type. The sizeof operator can be used to get the size of classes, structures, unions and any other user defined data type. The syntax of using sizeof is as follows − sizeof (data type)
What are the uses of comma and conditional (?) operators?
The comma operator (,) allows you to evaluate multiple expressions wherever a single expression is allowed. The comma operator evaluates the left operand, then the right operand, and then returns the result of the right operand.
Why do we use commas?
A comma marks a slight break between different parts of a sentence. Used properly, commas make the meaning of sentences clear by grouping and separating words, phrases, and clauses.
Why is comma important?
Commas help your reader figure out which words go together in a sentence and which parts of your sentences are most important. Using commas incorrectly may confuse the reader, signal ignorance of writing rules, or indicate carelessness.
What is the size of () operator?
The sizeof operator is the most common operator in C. It is a compile-time unary operator and used to compute the size of its operand. It returns the size of a variable. It can be applied to any data type, float type, pointer type variables.
What is an example of a comma sentence?
Compound Sentences Use a comma to separate the independent clauses in a compound sentence: Example: The snow started to fall heavily, so all the schools and universities closed early. The comma is optional if both independent clauses are short and the meaning is clear.
What comma means?
A comma is a punctuation mark that represents a short pause and is used to divide parts of a sentence. A comma usually resembles a dot with a tail (,) and is placed at the bottom of a line of text or writing.
What is a comma and its uses?
A comma (,) is a punctuation mark that is frequently used in sentences. Commas separate ideas, add pauses, and help you to list things clearly. They also let us connect words, phrases, and clauses together to make longer sentences. In fact, the comma is one of the most important and commonly used types of punctuation.
What does the comma operator do?
The comma operator (,) evaluates each of its operands (from left to right) and returns the value of the last operand. This lets you create a compound expression in which multiple expressions are evaluated, with the compound expression’s final value being the value of the rightmost of its member expressions. This is commonly used to provide multiple parameters to a for loop.
What does comma operator mean in a switch statement?
– The variable declaration statements must be terminated with semicolon. – The statements after declaration statement can be terminated by comma operator. – The last statement of the program must be terminated by semicolon.
Does C have a concatenation operator?
The + operator can be used between strings to add them together to make a new string. This is called concatenation: In the example above, we added a space after firstName to create a space between John and Doe on output. However, you could also add a space with quotes ( ” ” or ‘ ‘ ):
How can I format currency with commas in C?
– Open the form or report Layout View or Design View. – Position the pointer in the text box with the number or currency. – Press F4 to display the Property Sheet. – Set the Format property to one of the predefined date formats.