Page 204 - Data Science class 11
P. 204

6.2.4 Booleans (Logical Values)
        In programming, you often need to know if an expression is true or false. You can evaluate any expression in R and
        get one of two answers: TRUE or FALSE.
        When you compare two values, the expression is evaluated and R returns the logical answer.

        Example
        Enter the following code snippet in the script panel:

             10 > 9    # TRUE because 10 is greater than 9
             10 == 9   # FALSE because 10 is not equal to 9
             10 < 9    # FALSE because 10 is greater than 9
        Run to see the following in the console panel:





















        You can also run a condition in an if statement, which you will learn much more about in the if..else.

        •   if-else statement—This is a conditional element selection statement that executes a block of code if a specified
            condition is true. If the condition is false, another block of code can be executed.

        Example

             if (age >=18)
             {
                  print(“You are eligible to vote”)
             }
             else
             {
                   print(“You are not eligible to vote”)
             }
        Example
        Enter the following code snippet in the script panel:

             a <- 200
             b <- 33
             if (b > a) {
               print ("b is greater than a")
             } else {
               print("b is not greater than a")
             }



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