How does evaluate work in Cobol?

How does evaluate work in Cobol?

EVALUATE provides a multi selection control during the program execution. EVALUATE used to validate multiple conditions in a single shot. If none of the EVALUATE satisfies, the statements coded under WHEN OTHER gets executed by default and control transfers to the next executable statement after EVALUATE.

What is EVALUATE statement in COBOL?

EVALUATE statement is used for conditional processing which helps in eliminating a series of nested IF statements to test several conditions. The EVALUATE statement is very similar to the CASE construct common in many other programming languages.

What is EVALUATE statement?

The EVALUATE statement provides a shorthand notation for a series of nested IF statements. The EVALUATE statement can evaluate multiple conditions. The subsequent action depends on the results of these evaluations.

Why do we use evaluate in COBOL?

COBOL EVALUATE. EVALUATE We can use EVALUATE instead of set of nested IF statements to test several conditions. We can use EVALUATE to implement case structure or decision table. if second WHEN condition is false, then control will go to the MOVE statement coded after WHEN OTHER, here it wont check for true or false.

What is the difference between if and evaluate in COBOL?

There is no end to the depth of COBOL nested IF statements. But, when the COBOL program has to examine a variable for more than two levels, EVALUATE is the more preferred choice. Evaluate statement in COBOL is faster than nested IF-ELSE statements.

Can we use evaluate inside evaluate in Cobol?

The key difference between EVALUATE and VBA Select Case is that no ‘Break’ is required i.e. control automatically transpire of the EVALUATE statement as soon as condition matched. You can use Nested Evaluate in COBOL instead of nested If-ELSE statements.

Can we use if inside evaluate in Cobol?

EVALUATE We can use EVALUATE instead of set of nested IF statements to test several conditions. We can use EVALUATE to implement case structure or decision table. We can use following EVALUATE statement instead of above nested IF.

Can we use if inside evaluate in COBOL?

Can we use Evaluate inside evaluate in COBOL?

Can I declare occurs in 01 level?

Why occurs clause cannot be declared at 01 level? according to the manual, a table is defined within a group item with an occurs clause. if the occurs clause were to be declared at the 01 level, there would be no group item, thus no beginning of table resolution.

How define occurs clause in COBOL?

COBOL – Occurs Clause OCCURS clause is used to define a table. OCCURS clause indicates the repetition of data name definition. OCCURS clause specifies tables whose elements can be referred to by indexing or subscripting.

What is the maximum length of PARM parameter in JCL?

100 characters
The maximum length for the PARM variable is 100 characters, which might cause problems if you use custom directory names.

When to use an EVALUATE statement in COBOL?

EVALUATE statement is used for conditional processing in COBOL. If multiple conditions need to be checked then EVALUATE is a better than IF-ELSE. Using a single EVALUATE condition, we can check multiple conditions.

Is it possible to nesting if else in COBOL?

Nesting of IF-ELSE is possible and below is the one of example which explains multiple IF ELSE statements. The above example has around 5 levels of IF statement and it’s bit clumsy and difficult to follow when so much processing is involved in each level.

How many level fields are there in evaluate True?

With EVALUATE TRUE, we could also use 88 level fields to process the logic based on SET values. Based on the set values the evaluate runs and correct section is processed.