Rules for arithmetic operators in Caché

Question

Question

Ponnumani Gurusamy · Aug 17, 2016

#Caché #ObjectScript

write "5apples" + "7 orange" //Ans :12

Values are string , why add numeric value . its an error or correct . please tell me.

Discussion (7)0

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Carlos Lopes · Aug 24, 2016

Numeric operators convert their arguments to numbers (according to well defined rules) before performing the operation. That's why "5apples"+ "7 orange" gives 12.
Conversely, string operators convert their arguments to strings before the operations is performed.

In other words, regardless of the arguments, the operator automatically performs the necessary conversions according to what it expects.

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score 1 · Answer 1 · 2016-08-17T08:13:47-04:00

because + is an operation for numbers, and yes, answer is correct, because 5 + 7 is 12

if you expected to see "5apples7 orange", in this case you should use concatenate operator "_"
write "5apples" _ "7 orange"

score 0 · Answer 2 · 2016-08-17T08:30:06-04:00

Ponnumani Gurusamy · Aug 17, 2016

Thank you for your guidance . But "" its mentioned string . how to add a string ?

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score 3 · Answer 3 · 2016-08-17T08:34:15-04:00

if you need add a string, you should concatenate it with operator _

+ converts all types to number, and doing arithmetical operator add

7_"" became "7"
+"5apples" became 5

score 0 · Answer 4 · 2016-08-17T09:23:43-04:00

Ponnumani Gurusamy · Aug 17, 2016

Thank you Dmitry

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score 1 · Answer 5 · 2016-08-17T13:55:00-04:00

Evgeny Shvarov · Aug 17, 2016

Hi, Ponnumani. I've changed the title to closer to the question version.

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score 0 · Answer 6 · 2016-08-24T03:29:49-04:00

AFAIK everything is a string, it's just parsed prior to being processed. So it sees the 5, then characters it omits, same for the other string, so you are left with two numbers (which probably are processed as floats) which the + operator adds. Is that correct?