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• The Sentences is a programming language is called
Statement.
• The principle, how statement constructed in a
programming language is called language Syntax.
• Placed with in the “<script>” tags.
• Ex : <script>JavaScript statements</script>
• <script> have two important attribute
• language attribute.
• Type attribute.
• <script language=“en”
type=“text/javascript”>JavaScript
statements</script>
• Javascript can be embedded in the Web page
in a following ways :
• Inside head Tag<head></head>
• Inside body Tag<body></body>
• In an External Source File.
• Ex : add external JS file to web page:
• <script language=“en” type=“text/javascript”
src=“external.js”></script>
• JS Variable are containers for storing
data value.
• Data can be placed into container and
referred by variable name.
• Declaration of variable is done by using
key “var” or “let” .
• Variable can be initialized at
declaration or after declaration .
• Local Variable.
• Global Variable
• Variable naming convention can
not be use reserved keywords.
• Case-Sensitive.
• Variable name must be begin with
a “letter” or “_” or “$”.
• An operator is explained below:
• 3 + 4 = 7 {where ‘+’ is an operator.
. And ‘3 & 4’ is an operand. }
• Operators are supported :
• Arithmatic
• Assignment
• Shift >> or <<
• Unary !
• Conditonal
• Logical
• Bitwise
• Comparision
• String
• Arithmatic Operator :
• Arithmatic operator is used to arithmatic operation
between two or more values or variable.
Arithmatic operator are :
• ‘+’ operator.
• ‘-’ operator.
• ‘x’ operator.
• ‘/’ operator.
• ‘%’ operator.
• ‘++’ Increment operator.
• ‘- -’ Decrement operator
• Assignment Operator :
• Assignment operator is used to assign values to
JavaScript variable.
Assignment operator are :
• ‘==’ operator.
• ‘+=’ operator.
• ‘-=’ operator.
• ‘*=’ operator.
• ‘%=’ operator.
• ‘/=’ operator.
• Logical Operator :
• Logical operator is used to determine the logic
between JavaScript variable.
Logical operator are :
• ‘&&’ “AND” operator.
• ‘||’ “OR” operator.
• ‘!’ “NoT” operator.
• Comparision Operator :
• comparision operator is used to compare two values
or variables.
Comparision operator are :
• ‘==’ operator.
• ‘===’ operator.
• ‘!=’ operator.
• ‘!==’ operator.
• ‘>=’ operator.
• ‘<=’ operator.
• ‘<’ or ‘>’ operator
• Bitwise Operator :
• Bitwise operator works on 32 bit number.
• Any numeric operand in the operation converted
into 32 bit number.
Bitwise operator are :
• ‘&’ operator.
• ‘|’ operator.
• ‘~’ ‘NOT’ operator.
• ‘^’ ‘XOR’ operator.
• ‘>>’ operator.
• ‘<<’ operator.
• >>> operator
• Unary Operator :
• Unary operator is used to convert
variable to number.
• Bitwise operator are :

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Basic concept of js

  • 1. • The Sentences is a programming language is called Statement. • The principle, how statement constructed in a programming language is called language Syntax. • Placed with in the “<script>” tags. • Ex : <script>JavaScript statements</script> • <script> have two important attribute • language attribute. • Type attribute. • <script language=“en” type=“text/javascript”>JavaScript statements</script>
  • 2. • Javascript can be embedded in the Web page in a following ways : • Inside head Tag<head></head> • Inside body Tag<body></body> • In an External Source File. • Ex : add external JS file to web page: • <script language=“en” type=“text/javascript” src=“external.js”></script>
  • 3. • JS Variable are containers for storing data value. • Data can be placed into container and referred by variable name. • Declaration of variable is done by using key “var” or “let” . • Variable can be initialized at declaration or after declaration .
  • 4. • Local Variable. • Global Variable • Variable naming convention can not be use reserved keywords. • Case-Sensitive. • Variable name must be begin with a “letter” or “_” or “$”.
  • 5.
  • 6. • An operator is explained below: • 3 + 4 = 7 {where ‘+’ is an operator. . And ‘3 & 4’ is an operand. } • Operators are supported : • Arithmatic • Assignment • Shift >> or << • Unary ! • Conditonal • Logical • Bitwise • Comparision • String
  • 7. • Arithmatic Operator : • Arithmatic operator is used to arithmatic operation between two or more values or variable. Arithmatic operator are : • ‘+’ operator. • ‘-’ operator. • ‘x’ operator. • ‘/’ operator. • ‘%’ operator. • ‘++’ Increment operator. • ‘- -’ Decrement operator
  • 8. • Assignment Operator : • Assignment operator is used to assign values to JavaScript variable. Assignment operator are : • ‘==’ operator. • ‘+=’ operator. • ‘-=’ operator. • ‘*=’ operator. • ‘%=’ operator. • ‘/=’ operator.
  • 9. • Logical Operator : • Logical operator is used to determine the logic between JavaScript variable. Logical operator are : • ‘&&’ “AND” operator. • ‘||’ “OR” operator. • ‘!’ “NoT” operator.
  • 10. • Comparision Operator : • comparision operator is used to compare two values or variables. Comparision operator are : • ‘==’ operator. • ‘===’ operator. • ‘!=’ operator. • ‘!==’ operator. • ‘>=’ operator. • ‘<=’ operator. • ‘<’ or ‘>’ operator
  • 11. • Bitwise Operator : • Bitwise operator works on 32 bit number. • Any numeric operand in the operation converted into 32 bit number. Bitwise operator are : • ‘&’ operator. • ‘|’ operator. • ‘~’ ‘NOT’ operator. • ‘^’ ‘XOR’ operator. • ‘>>’ operator. • ‘<<’ operator. • >>> operator
  • 12. • Unary Operator : • Unary operator is used to convert variable to number. • Bitwise operator are :