Handbook of SAS DATA Step Programming

41Understanding How the DATA Step Works

or user-dened formats. For example, to display the contents of all variables

in the PDV, you can submit the following command:

examine _all_

Here are the generated results from the submitted statement above:

Debugger Log:

Stopped at line 30 column 5

> examine _all_

ID =

score =.

total = 0

_ERROR_ = 0

_N_ = 1

If you want to examine the content for only one variable, for example, TOTAL,

you can type the following command line:

examine total

In the debugging mode, you can execute the DATA step either one statement

or several statements at a time by using the STEP command. The general

form of the STEP command is as follows:

STEP <n>

The optional n in the STEP command is used to specify the number of state-

ments to execute ...