The conditions used in IF statements are basically three types.

1. Sign
2. Relation
3. Complex

IF Sign condition -

IF SIGN condition is used to verify the sign of a particular data item. There are three types sign validation.

1. POSITIVE
2. NEGITIVE
3. ZERO

IF	Identifier/data-name IS [NOT] {POSITIVE/NEGATIVE/ZERO}

IF Sign condition - Practical Example:

IF Relation condition -

IF Relation condition is used to verify the relation between two identifiers/literals. The below are the IF relational conditions

1. GREATER THAN
2. LESS THAN
3. EQUAL
4. NOT

IF	{Identifier/Literal} IS [NOT] 	{GREATER THAN/
					>/
					LESS THAN/
					=/
					LESS THAN OR EQUAL TO/
					<=}
					{Identifier/Literal}

IF Relation condition - Practical Example:

IF Complex condition -

IF complex condition is used to verify the one or more sign or relational types. Complex condition is the combination of conditions by using AND/OR operators .The below are the IF complex conditions

1. AND
2. OR

IF Condition {AND/OR} Condition

IF Complex condition - Practical Example -