JavaScript Conditions: If/else Statement

      Conditional Statements are used to perform different actions for different decisions and situations. In JavaScript we use "if" to specify a block of code to be executed, if a specified condition or statement is true. "else" will be used  to specify a block of code to be executed, if the same condition from the "if" statement is false. "else if" will be used to specify a new condition to test, if the first condition is false and the condition of this statement is true, this statement will be executed before the "else" statement.

example:

if(expression){

code will execute if expression is true

}

else if (expression2){

code will execute expression is false and expression2 is true

}

else{

code executed when both expressions are false

}

      "switch" is similar to "if"/"else" statements. They have a default value in which codes executes when nothing happens. Then they have case values that can be as much as you want, which are executed if a case is true. 

example:

switch(expr){

case value1:

execute if expr==value1

break;

case value2:

execute if expr==value2

break;

default:

executed if no case values match the expression

}