{"id":77774,"date":"2020-01-22T16:44:32","date_gmt":"2020-01-22T11:14:32","guid":{"rendered":"https:\/\/www.vskills.in\/certification\/tutorial\/?p=77774"},"modified":"2024-04-12T14:29:55","modified_gmt":"2024-04-12T08:59:55","slug":"operators-2","status":"publish","type":"page","link":"https:\/\/www.vskills.in\/certification\/tutorial\/operators-2\/","title":{"rendered":"Operators"},"content":{"rendered":"

Operators<\/strong><\/h4>\n

NASL provides arithmetic, comparison, and assignment operators. These operators are explained in the following sections.<\/p>\n

Arithmetic Operators<\/strong><\/p>\n

Here are the common arithmetic operators:<\/p>\n

+Used to add numbers. It can also be used to perform string concatenation.<\/p>\n

-Used to perform subtraction. It can also be used to perform string subtraction. For example, ‘cat, dog, mouse’ – ‘, dog’ results in the string ‘cat, mouse’.<\/p>\n

*Used to multiply numbers.<\/p>\n

\/Used to divide numbers. Note that NASL will return a 0 if you try to divide by zero.<\/p>\n

%Used to perform a modulo operation. For example, 10%3 computes to 1.<\/p>\n

**Used to perform exponentiation. For example, 2**3 computes to 8.<\/p>\n

++Used to increment a variable’s value by 1. When a variable is prefixed by this operator (example: ++c), its value is incremented before it is evaluated. When a variable is post-fixed by this operator (example: c++), its value is incremented after it is evaluated.<\/p>\n

\u2014Used to decrement a variable’s value by 1. When a variable is prefixed by this operator (example: –c), its value is decremented before it is evaluated. When a variable is post-fixed by this operator (example: c–), its value is decremented after it is evaluated.<\/p>\n

Comparison Operators<\/strong><\/p>\n

Here are the common comparison operators:<\/p>\n

>Used to test whether a given value is greater than the other.<\/p>\n

>=Used to test whether a given value is greater than or equal to the other.<\/p>\n

<Used to test whether a given value is less than the other.<\/p>\n

<=Used to test whether a given value is less than or equal to the other.<\/p>\n

==Used to test whether a given value is equal to the other.<\/p>\n

!=Used to test whether a given value is not equal to the other.<\/p>\n

><Used to test whether a given substring exists within a string. For example, ‘123’><‘abcd123def’ evaluates to TRUE.<\/p>\n

>!<Used to test whether a given substring does not exist within a string. In this case, ‘123’>!<‘abcd123def’ evaluates to FALSE.<\/p>\n

=~Used to match a regular expression. Using this operator is similar to calling the ereg( ) function call, which performs a similar operation. For example, the statement str =~ ‘^[GET \/ HTTP\/1.0\\r\\n\\r\\n][.]*’) evaluates to TRUE only if str begins with the string GET \/ HTTP\/1.0\\r\\n\\r\\n.<\/p>\n

!~Used to test whether a regular expression does not match. It is the opposite of the =~ operator.<\/p>\n[]Used to select a character from a string by index. For example, if mystring is a1b2c3, mystring[3] evaluates to 2.<\/p>\n

Assignment Operators<\/strong><\/p>\n

Here are the common assignment operators:<\/p>\n

=Used to assign a value to a variable.<\/p>\n

+=Used to increment a variable’s value. For example, a += 3 increments the value of a by 3, and is equivalent to the statement a = a + 3.<\/p>\n

-=Used to decrement a variable’s value. For example, a -=3 decrements the value of a by 3, and is equivalent to the statement a = a – 3.<\/p>\n

*=Used to multiply a variable’s value by a specified value. For example, a *= 3 causes the variable a to be assigned a value equal to itself multiplied by 3, and is equivalent to the statement a = a * 3.<\/p>\n

\/=Used to divide a variable’s value by a specified value. For example, a \/=3 causes the variable a to be assigned a value equal to itself divided by 3, and is equivalent to the statement a = a \/ 3.<\/p>\n

%=Used to assign a variable a value equal to the remainder of a division operation between itself and a specified value. For example, a %=3 causes the variable a to be assigned a value that is equal to the remainder of the operation a\/3, and is equivalent to the statement a = a % 3.<\/p>\n

Apply for Network Security Open Source Software Developer Certification Now!!<\/h3>\n

https:\/\/www.vskills.in\/certification\/network-security-open-source-software-developer-certification<\/a><\/p>\n

Back to Tutorial<\/a><\/strong><\/h4>\n","protected":false},"excerpt":{"rendered":"

Operators NASL provides arithmetic, comparison, and assignment operators. These operators are explained in the following sections. Arithmetic Operators Here are the common arithmetic operators: +Used to add numbers. It can also be used to perform string concatenation. -Used to perform subtraction. It can also be used to perform string subtraction. For example, ‘cat, dog, mouse’…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[9066],"tags":[1433],"class_list":["post-77774","page","type-page","status-publish","hentry","category-network-security-open-source","tag-operators"],"acf":[],"yoast_head":"\nOperators - Tutorial<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vskills.in\/certification\/tutorial\/operators-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Operators - Tutorial\" \/>\n<meta property=\"og:description\" content=\"Operators NASL provides arithmetic, comparison, and assignment operators. These operators are explained in the following sections. 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