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In JavaScript we have the following conditional statements:

  • if statement - you would use this statement to execute some code only if a specified condition is true
  • if...else statement - you would use this statement to execute some code if the condition is true and another code if the condition is false
  • if...else if....else statement - you would use this statement to select one of many blocks of code to be executed
  • switch statement - you would use this statement to select one of many blocks of code to be executed
For example: If StatementUse the if statement to execute some code only if a specified condition is true. Syntaxif (condition)

{

code to be executed if condition is true

}

If...else StatementUse the if....else statement to execute some code if a condition is true and another code if the condition is not true. Syntaxif (condition)

{

code to be executed if condition is true

}

If...else if...else StatementUse the if....else if...else statement to select one of several blocks of code to be executed. Syntaxif (condition1)

{

code to be executed if condition1 is true

}

else if (condition2)

{

code to be executed if condition2 is true

}

else

{

code to be executed if condition1 and condition2 are not true

}

else

{

code to be executed if condition is not true

}

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