[R] Help with if else branching print out

Andrew ph@edru@v @ending from gm@il@com
Tue Dec 18 09:56:23 CET 2018


Hi all

Playing around with some branching using if, if else, and else, I wrote 
the following very basic script:


[code block]

## Take single value input from user:
# Note 'as.integer' to convert character vector to numeric for testing

nums <- (as.numeric(readline("Please enter a number between 1 and 15: ")))

## Truth test routine:
# Set conditional values and test input against conditions and then 
print outcome

if ((nums > 15) || (nums < 1))
{
   print(c(nums, "is not between 1 or 15"))
} else if ((nums > 5) && (nums < 10) || (nums == 12))
{
   print(c(nums, "falls within 6 - 9 inclusively, or is 12"))
}  else
{
   print( c(nums, "is *not* 6 - 9 inclusive, nor is it 12"))
}

[/ code block]


However, it prints out like this:

[output]

Please enter a number between 1 and 15: 17
[1] "17"                     "is not between 1 or 15"

Please enter a number between 1 and 15: 9
[1] "9"
[2] "falls within 6 - 9 inclusively, or is 12"

Please enter a number between 1 and 15: 13
[1] "13"                                     "is *not* 6 - 9 inclusive, 
nor is it 12"

[/ output]


How do I:

(a) reduce the gap between the reported number (i.e., 17, 9, 13) in each 
of the lines? and

(b) ensure that in the case of the second run using 9 as the input, the 
print is not over two lines?

I will try the switches function soon, which may yield a different 
output format, but wanted to get my head around why this is printing out 
the way it is.

Many thanks for any help.

Andrew


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