Intrinsic Logical Operations

A LOGICAL or boolean expression returns a .TRUE. / .FALSE. result. The following are valid with LOGICAL operands,

• .NOT. -- .TRUE. if operand is .FALSE..
• .AND. -- .TRUE. if both operands are .TRUE.;
• .OR. -- .TRUE. if at least one operand is .TRUE.;
• .EQV. -- .TRUE. if both operands are the same;
• .NEQV. -- .TRUE. if both operands are different.

For example, if T is .TRUE. and F is .FALSE.

• .NOT. T is .FALSE., .NOT. F is .TRUE..
• T .AND. F is .FALSE., T .AND. T is .TRUE..
• T .OR. F is .TRUE., F .OR. F is .FALSE..
• T .EQV. F is .FALSE., F .EQV. F is .TRUE..
• T .NEQV. F is .TRUE., F .NEQV. F is .FALSE..

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