C what does do

The operands to the logical AND operator don't need to have the same type, but they must have boolean, integral, or pointer type. The operands are commonly relational or equality expressions. The first operand is completely evaluated and all side effects are completed before evaluation of the logical AND expression continues.

The second operand is evaluated only if the first operand evaluates to true nonzero. This evaluation eliminates needless evaluation of the second operand when the logical AND expression is false. You can use this short-circuit evaluation to prevent null-pointer dereferencing, as shown in the following example:. If pch is null 0 , the right side of the expression is never evaluated.

Whereas when we use the increment and decrement operators as postfix means after the operand , then first the larger expression is evaluated which is printf in this case and then the value of the operand is updated. The relational operators or comparison operators are used to check the relationship between two operands. It checks whether two operands are equal or not equal or less than or greater than , etc. It returns 1 if the relationship checks pass , otherwise, it returns 0.

For example, if we have two numbers 14 and 7 , if we say 14 is greater than 7 , this is true , hence this check will return 1 as the result with relationship operators. On the other hand, if we say 14 is less than 7 , this is false , hence it will return 0. To learn in what order the relational operators are executed, visit C Operator Precedence.

When we use relational operators, then based on the result of the comparison done, if it's true , then the output is 1 and if it's false , then the output is 0. We will see the same in the example below. In the code example above, a has value 10 , and b has value 20 , and then different comparisons are done between them.

In the C language, true is any value other than zero. And false is zero. These operators are used to perform logical operations and used with conditional statements like C if-else statements. With AND operator, only if both operands are true , the result is true. With the OR operator, if a single operand is true , then the result will be true. The NOT operator changes true to false , and false to true.

Bitwise operators perform manipulations of data at the bit level. These operators also perform the shifting of bits from right to left.

Bitwise operators are not applied to float or double , long double , void , etc. Learn about C float and double datatype. The following table contains the bitwise operators. There are 6 bitwise operators in the C language. Below we have a truth table for showing how these operators work with different values. Bitwise operators can produce any arbitrary value as result.

It is not mandatory that the result will either be 0 or 1. The bitwise shift operator shifts the bit value , either to the left or right. The left operand specifies the value to be shifted and the right operand specifies the number of positions that the bits in the value have to be shifted. Both operands have the same precedence. Please note, shift doesn't work like rotating, which means, the bits shifted are not added at the other end.

The bits that are shifted are lost. The one's complement operator, will change all the 1's in the operand to 0, and all the 0's are set to 1. For example, if the orginal byte is , then after one's complement it will become The sssignment operators are used to assign value to a variable. Below we have a code example in which we have used all the different forms of assignment operator, starting from the basic assignment.

The ternary operator, also known as the conditional operators in the C language can be used for statements of the form if-then-else. The first expression expression 1 returns either true or false , based on which it is decided whether expression 2 will be executed or expression 3. If expression 1 returns false then the expression on the right side of : i. Apart from arithmetic, relational, logical, assignment, etc. You can see a list of such operators in the below table. Here is a code example, try running in the live code compiler using the Run code button.

Size of a is: 4 Size of b is: 1 Size of c is: 8 Memory address of a: Previous Compute the parity of a number using XOR and table look-up. Next Write a one line C function to round floating point numbers.

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