What kind of operators are and or and not

You use the comparison operators to compare values and return a result that is True, False, or Null. Note: In all cases, if either the first value or the second value is null, the result is then also null. Because null represents an unknown value, the result of any comparison with a null value is also unknown. You use the logical operators to combine two Boolean values and return a true, false, or null result. Logical operators are also referred to as Boolean operators.

Combines two strings to form one string and propagates null values if one value is Null, the entire expression evaluates to Null. You use the special operators to return a True or False result as described in the following table. Is Null or Is Not Null. Matches string values by using the wildcard operators?

Need more help? Expand your skills. Get new features first. Was this information helpful? Yes No. Thank you! Any more feedback? The more you tell us the more we can help. This expression has two relational operators and one logical operator.

We can say this in English as: It is true that six is greater than four and that two is less than or equal to fourteen. When forming logical expressions programmers often use parentheses even when not technically needed to make the logic of the expression very clear. Consider the above complex Boolean expression rewritten:. Most programming languages recognize any non-zero value as true.

This makes the following a valid expression:. But remember the order of operations. In English, this is six is greater than four and eight is not zero. For the next example, just imagine a teenager talking to their mother. Skip directly to site content Skip directly to page options Skip directly to A-Z link. Section Navigation. Facebook Twitter LinkedIn Syndicate.

Functions and Operators. Minus Related Pages. Operators There are various types of operators discussed in this appendix. The following types are provided: Arithmetic Operators are used to perform mathematical calculations. Assignment Operators are used to assign a value to a property or variable. Assignment Operators can be numeric, date, system, time, or text.

Comparison Operators are used to perform comparisons. Concatenation Operators are used to combine strings. Operator Precedence If several operations occur in an expression, each part is evaluated and resolved in a predetermined order called Operator Precedence.

Subtraction — Used for subtraction or negation. Basic arithmetic operator used for subtraction or negation; the result of an arithmetic operator is usually a numeric value i. Compares a value greater than another value; the result of comparison operators is usually a logical value, either True or False. Comparison operator used for comparing a value greater than another value; the result of comparison operators is usually a logical value, either True or False.

Compares a value less than another value; the result of comparison operators is usually a logical value, either True or False. Comparison operator used for comparing a value less than another value; the result of comparison operators is usually a logical value, either True or False. The value can be a whole or partial text value. Text variables must be enclosed in quotes.

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