IBM SC34-5764-01 Manual do Utilizador descarregar pdf (Página 163)

100

101

Note: Using the LEAVE or ITERATE instructions can also modify the execution of repetitive loops.

Evaluate exprr + 0

evaluate expri + 0

exprt + 0, exprb + 0,

exprf + 0

in order written

and

Assign start value to control

variable

Use TO value (expr) to test

control variable for termination

Discontinue execution of DO

group if TO value is exceeded

Discontinue execution of DO

group if number of iterations

is exceeded

Discontinue execution of DO

group if FOR value (number of

iterations through the loop) is

exceeded

Discontinue execution of DO

group if WHILE condition is

not met

Discontinue execution of DO

group if UNTIL condition is

met

Use FOR value (exprf) to test

for termination

Use WHILE expression (exprw)

to test for termination

Use BY expression (exprb) to

update control variable

Use UNTIL expression (expru)

to test for termination

Use count of iterations (exprr)

to test for termination

Execute instruction(s)

in the DO group

Figure 49. Concept of a DO Loop

Chapter 13. Keyword Instructions 141

1 2 ... 158 159 160 161 162 163 164 165 166 167 168 ... 480 481

Comentários a estes Manuais

Sem comentários

IBM SC34-5764-01 Manual do Utilizador Página 163

Comentários a estes Manuais

Manuais e produtos relacionados com Software IBM SC34-5764-01