## Tuesday, October 21, 2014

### Operators In Javascript

• JAVASCRIPT OPERATOR:

ARITHMATIC OPERATOR
ASSIGNMENT OPERATOR
COMPARISION OPERTOR
LOGICAL OPERATOR
CONDITIONAL OPERATOR

ARITHMATIC OPERATOR:

• Arithmetic operators are used to perform arithmetic between variables

and/or values.

• Given that y=5, the table below explains the arithmetic operators:
 Operator Description Example Result + Addition x=y+2 x=7 - Subtraction x=y-2 x=3 * Multiplication x=y*2 x=10 / Division x=y/2 x=2.5 % Modulus (division remainder) x=y%2 x=1 ++ Increment x=++y x=6 -- Decrement x=--y x=4

ASSIGNMENT OPERATOR:

• Assignment operators are used to assign values to JavaScript variables.
• Given that x=10 and y=5, the table below explains the assignment operators:
 Operator Example Same As Result = x=y x=5 += x+=y x=x+y x=15 -= x-=y x=x-y x=5 *= x*=y x=x*y x=50 /= x/=y x=x/y x=2 %= x%=y x=x%y x=0

COMPARISION OPERATOR:

• Comparison operators are used in logical statements to determine equality or difference between variables or values.
• Given that x=5, the table below explains the comparison operators:
 Operator Description Example == is equal to x==8 is false === is exactly equal to (value and  type) x===5 is true x==="5" is false != is not equal x!=8 is true > is greater than x>8 is false < is less than x<8 is true >= is greater than or equal to x>=8 is false <= is less than or equal to x<=8 is true

## How Can it be Used

• Comparison operators can be used in conditional statements to compare values and take action depending on the result:

For Example:

`    If (age<18) `
`               document.write("Too young");`
` LOGICAL OPERATOR:`
• Logical operators are used to determine the logic between variables or values.
• Given that x=6 and y=3, the table below explains the logical operators:
 Operator Description Example && and (x < 10 && y > 1) is true || or (x==5 || y==5) is false ! not !(x==y) is true

` `

CONDITIONAL OPERATORS:

• JavaScript also contains a conditional operator that assigns a value to a variable based on some condition.

Syntax:
<Variable name> = <condition>? value1: value2

Example:
x = (y == 5)? “x is true”:”x is false”
- Here if value of y is 5 then value of x = “x is true”
- If value of y is not 5 then value of = “x is false”

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