VAL()


VAL . - , . , . , , ( ). VAL , , .

, . , , .

VAL ( , v1^a=10, v1^b=20 v2=30):

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val ('15.79') 15.79

val (v1) 10

val (v1^a) 10

val (v2) 30

val ("19"v1^b) 1920

val ('xxxx7yyy8zzzz') 7

val ('abs.5.8-4 ml') 0.00058

val ('') 0

val ('- 1985') 0

0 ( 1985), , , '-' 0. , , , .