Elementary Statistics and Computer Application

The ON-GoTo Statement

This statement is a conditional branch transfer type of statement. The transfer of control depends on the value of the expression which is a part of this statement.
The general form is



where
v -- may be a constant, a variable, or an expression
n1, n2, …np – are labels of other statements in a program. The labels n1,
n2, …np must be separated from each other by a comma.
This statement functions as follows
When v =1, control goes to statement labeled n1,
When v =2, control goes to statement labeled n2,
…………….
…………..
When v =p, control goes to statement labeled np.
Program
10 LET X=3
20 ON X GOTO 80, 60, 30
30 PRINT X
40 X=X-1
50 GOTO 20
60 PRINT X
70 GOTO 40
80 PRINT X
90 STOP
100 END
Output

3
2
1