Two Ninute

Nan

#$16$: Set and Kill

Variables are defined dynamically. When you log in to a system, no variables are defined. The course of your program will define variables via the READ$(R)$ and SET $($S$)$ commands, and undefine variables via the KILL $($K$)$ command. Notice that commands can be abbrevialed to one letter.

As you know, there are two kinds of variables: string and numeric. A variable may be defined via a READ command, in which case itis autiomalicaly a sting. The other way a variable can be defined is by the SET command which can define it as either string or numeric.

The syntax tor the SET command is:

S argl, arg$2..$ argx

The statement

$5$ VAR $=$ EXP

replaces $($or defines$)$ the variable VAR with the value of the expression EXP. The data type of varis detemined by the expression.

II execute the following code

B $25x=2,y=x$

All sting

What type of variables are $x,Y$ and $Z?$

$x_1$ y numeric, $2$ string

All numeric