| Relational Logical Expressions are expressed with the help of Relational operators. |
|
| Relational operators |
| These are the relational operators: |
| Mathematical symbol |
Meaning |
Fortran equivalent |
| > |
greater than |
.GT. |
| >= |
greater than or equal to |
.GE. |
| < |
less than |
.LT. |
| <= |
less than or equal to |
.LE. |
| = |
equal to |
.EQ. |
| <> |
not equal to |
.NE. |
|
| Example: |
| If A is greater than B then it is expressed in Fortran as: |
| A .GT. B |
| similarly, A .LT. B and so on. |
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| Logical Expressions |
| A logical expression is used to express a logical computation. Evaluation of a logical expression is expressed with a value of true or false. |
| Logical Operators are: |
| .NOT. |
| .AND. |
| .OR. |
| .EQV. |
| .NEQV. |
| The value of a logical term involving .AND. is shown as: |
| A1 |
A2 |
A1 .AND. A2 |
| TRUE |
TRUE |
TRUE |
| TRUE |
FALSE |
FALSE |
| FALSE |
TRUE |
FALSE |
| FALSE |
FALSE |
FALSE |
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