Meaning of a= b*(c<=i<=d) +1

[SanjuKumari]

I want to evaluate an expression in SAS . Can some one help me understand the meaning of this expression and write a short algo for this expression:

a= b*(c<=i<=d) +1

[Reeza]

Use the Order of Operations rule of basic mathematics and break it apart.

BEDMAS

*B = Brackets;
p1 = c<=i<=d;
*Exponents -none;
*Division and multiplication in the order they appear;
p2 = b*p1;
*Addition and subtraction in the order they appear;
p3 = p2 + 1;

*original formula;
A = b*(c<=i<=d) + 1;

*check the difference;
diff = p3 - A;

What do you mean by "write a short algo for this expression"?

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@SanjuKumari wrote:

I want to evaluate an expression in SAS . Can some one help me understand the meaning of this expression and write a short algo for this expression:

a= b*(c<=i<=d) +1

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[SanjuKumari]

i want to know what b will get multiplied with ?
the value of P1 as per u .

[SanjuKumari]

As i have to do this code migration, i need to understand it 

[SanjuKumari]

i want to know what b will get multiplied with ?
the value of P1 as per u .

[Reeza]

Run the code and test it.

[Kurt_Bremser]

You don't need to build an algorithm for this, this formula can be used as is in SAS.

[ErikLund_Jensen · Accepted solution]

Hi @SanjuKumari 

It means that the value of variable b is multiplied with the value of the logical expression in the parentheses, and then 1 is added to the result.

The logical expression c<=i<=d returns 1, if the value of variable i is within the interval c-d, or otherwise 0. So when variable b is multiplied with the the logical expression, the result is either b or 0.

Then you add 1 to the result, which means that variable a is assigned the value b+1 or 1 depending on whether variable i is within the interval c-d or not.