'A' - Means a character 1 byte (8 bits) long containing A. "A" - Means a string which is 2 bytes (16 bits) long which holds an A and a NULL character.
Difference between 'a' and "a" in C:
- 'a' is a character constant, whereas "a" is a string constant. - 'a' is a single character, whereas "a" is a string of length 1. - 'a' is stored in a char variable, whereas "a" is stored in a char array.
The & is a unary operator in C which returns the memory address of the passed operand. This is also known as address of operator. <> The * is a unary operator which returns the value of object pointed by a pointer variable.
In modern C, or even moderately ancient C, += is a compound assignment operator, and =+ is parsed as two separate tokens. = and + . Punctuation tokens are allowed to be adjacent.
Hence, The difference is: 'a' is a character & "a" is a String.
In the United States, academic grading commonly takes on the form of five, six or seven letter grades. Traditionally, the grades are A+, A, A−, B+, B, B−, C+, C, C−, D+, D, D− and F, with A+ being the highest and F being lowest.
More precisely, the post-increment a++ and the pre-increment ++a have different precedence. As you can see, a++ returns the value of a before incrementing. And ++a returns the value of a after it has been incremented.
++i will increment the value of i , and then return the incremented value. i++ will increment the value of i , but return the original value that i held before being incremented.
a - opens a file in append mode. r+ - opens a file in both read and write mode. a+ - opens a file in both read and write mode.
The equal-to operator ( == ) returns true if both operands have the same value; otherwise, it returns false . The not-equal-to operator ( != ) returns true if the operands don't have the same value; otherwise, it returns false .
== compares two variables irrespective of data, a type, while === compares two variables in a strict check, which means it checks for data and returns true or false.
%d is a format specifier, used in C Language. Now a format specifier is indicated by a % (percentage symbol) before the letter describing it. In simple words, a format specifier tells us the type of data to store and print. Now, %d represents the signed decimal integer.
In C programming language, %d and %i are format specifiers as where %d specifies the type of variable as decimal and %i specifies the type as integer.
C++ is an extension of the C language along with Object-Oriented Programming language (OOPs) that gives the advantage of security, better performance, speed, scalability, built-in library, and many more. Due to this, C++ is preferred if someone wants to work on complex projects.
Performance: Generally, C is faster than C++ due to the overhead from features like virtual function or exception handling. Compatibility: C code can be used in C++ programs, but the opposite is not always true because C++ adds additional features and syntax that are not in C.
There is no difference in these two types of array declaration.
++a returns the value of an after it has been incremented. It is a pre-increment operator since ++ comes before the operand. a++ returns the value of a before incrementing. It is a post-increment operator since ++ comes after the operand.
Both C++ and C# have striking similarities which are enlisted below for your reference: Both C++ and C# languages are derived from C so they find resemblances with syntax and symbols of the C language. Both languages are object-oriented and support polymorphism among other features.
Letter grade Percentage Grade definition A+ 90-100 Excellent A 85-89 Very good A– 80-84 Very good B+ 75-79 Good B.
In the prefix version (i.e., ++i), the value of i is incremented, and the value of the expression is the new value of i. So basically it first increments then assigns a value to the expression. In the postfix version (i.e., i++), the value of i is incremented, but the value of the expression is the original value of i.
These two are exactly the same. It's just two different ways of writing the same thing. i++ is just a shortcut for i += 1 , which itself is a shortcut for i = i + 1 .
i++ is faster because they return value before.
+= Add AND assignment operator. It adds the right operand to the left operand and assign the result to the left operand. C += A is equivalent to C = C + A.
Answer: * Operator is used as pointer to a variable. Example: * a where * is pointer to the variable a. & operator is used to get the address of the variable. Example: &a will give address of a.
C is a general purpose computer programming language developed in 1972 by Dennis Ritchie at the Bell Telephone Laboratories for use with the Unix operating system. It was named 'C' because many of its features were derived from an earlier language called 'B'.