Sas if then statement

Continues processing only those observations that meet the condition of the specified expression.

An if-then statement can be used to create a new variable for a selected subset of the observations. For each observation in the data set, SAS evaluates the expression following the if. When the expression is true, the statement following then is executed. When the expression is false, SAS ignores the statement following then. For a person whose age is less than 65, the variable older will be missing. An optional else statement can be included if-then-else to provide an alternative action when the if expression is false. An optional else-if statement can follow the if-then statement.

Sas if then statement

The ELSE statement is optional. It can be used to execute a statement if the condition is not true. Sometimes, we might need to execute more than one statement when the condition is met. Sign In. Members' area. Master SAS in 30 days! Start Your Free Training Now. The data set above contains 10 students and their exam results. DO Group. The DO group starts with the DO statement. Do you have a hard time learning SAS? Start Course for Free!

Let's try creating another status variable for our grades data set, but this time let's allow its value to depend on the value of the student's fourth exam e4 rather than the value of the student's first exam e1 :.

Task 1 : Suppose you are asked to exclude some of the observations in a SAS data set from an analysis that you are generating. For example, you want to exclude all IDs whose values are greater than Deepanshu founded ListenData with a simple objective - Make analytics easy to understand and follow. He has over 10 years of experience in data science. How behind the scene it works. I try to get the clue but still I am not clear.

Executes a statement for rows that meet specific conditions. Overview of Statements. Block Statements. Global Declaration Statements. Local Statements. Assignment Statement. BY Statement. DATA Statement.

Sas if then statement

The following examples show how to use each of these statements in practice with the following dataset in SAS:. The following tutorials explain how to perform other common tasks in SAS:. January 17, January 12, January 18, How to Add Target Line to Graph in How to Convert Date of Birth to Age How to Search for an Asterisk in a

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PUT: Column. SAS calls this "propagation of missing values. Creating New Variables Using if-then ; if-then-else ; and if-then-else-then Statements An if-then statement can be used to create a new variable for a selected subset of the observations. An optional else-if statement can follow the if-then statement. Don't ask why! Arguments expression is any SAS expression. Necessary cookies are absolutely essential for the website to function properly. If the expression is true for the observation its value is neither 0 nor missing , SAS continues to execute the DATA step and includes the observation in the output data set. We also use third-party cookies that help us analyze and understand how you use this website. What went wrong? New to site? In this example:. The two statements work differently and produce different output data sets in some cases. You've already seen an if-then -else statement in the previous lesson. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website.

IF statements execute code only if a condition is satisfied. However, the two statements are not equivalent.

How behind the scene it works. Don't ask why! Suppose our instructor wants to assign a grade of zero to any student who missed the fourth exam, as well as notify the student that she has done so. The cookie is used to store the user consent for the cookies in the category "Performance". Accessibility for Base. Necessary cookies are absolutely essential for the website to function properly. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". SAS evaluates the expression in the else-if statement only when the previous expression is false. Create an Account Login. Last updated: January 30, Note that this program also illustrates the use of more than one ELSE statement.