Table of Contents
How do I write an IF condition in FORTRAN?
The IF level of a statement S is the value n1-n2, where n1 is the number of block IF statements from the beginning of the program unit up to the end, including S; n2 is the number of END IF statements in the program unit up to, but not including, S. The IF -level of every statement must be zero or positive.
What are conditional statements in FORTRAN?
The conditional expressions are evaluated in sequence until one is found to be true. Then the associated code is executed and the control jumps to the next statement after the endif.
What is an if/then ElseIf statement?
When an If Then Else statement is encountered, condition is tested. If condition is True , the statements following Then are executed. If condition is False , each ElseIf statement (if there are any) is evaluated in order.
How do you write greater than or equal to in FORTRAN?
All relational operators have equal precedence. Character and arithmetic operators have higher precedence than relational operators….Relational Operator.
| Operator | Meaning |
|---|---|
| .LT. .LE. .EQ. .NE. .GT. .GE. | Less than Less than or equal Equal Not equal Greater than Greater than or equal |
Is if statement logical?
If statements are logical blocks used within programming. They’re conditional statements that tell a computer what to do with certain information. In other words, they let a program make ‘decisions’ while it’s running. They’re comprised of a minimum of two parts, ‘if’ and ‘then’.
How do you write absolute value in Fortran?
8.3 ABS — Absolute value ABS(A) computes the absolute value of A . The type of the argument shall be an INTEGER , REAL , or COMPLEX . Return value: The return value is of the same type and kind as the argument except the return value is REAL for a COMPLEX argument.
What does .lt mean in Fortran?
Logical expressions can only have the value .TRUE. or .FALSE.. A logical expression can be formed by comparing arithmetic expressions using the following relational operators: .LT. meaning < .LE. <= .
Is if and only if the same as equivalence?
Compound sentences of the form “P if and only if Q” are true when P and Q are both false or are both true; this compound sentence is false otherwise. It says that P and Q have the same truth values; when “P if and only if Q” is true, it is often said that P and Q are logically equivalent.
How do you use multiple IF statements?
To use multiple IF functions where we can add multiple logical tests, after the first logical condition and TRUE value, again insert another IF Function followed by the different logical values to be compared with the TRUE value result.
What does ABS mean in Fortran?
absolute value of x
Fortran Intrinsic Functions
| Function | Meaning | Return Type |
|---|---|---|
| ABS(x) | absolute value of x | INTEGER |
| REAL | ||
| SQRT(x) | square root of x | REAL |
| SIN(x) | sine of x radian | REAL |
What is * symbol in Fortran?
For dummy arguments or function names, len can have another form: a parenthesized asterisk, that is, CHARACTER*(*) , which denotes that the function name length is defined in referencing the program unit, and the dummy argument has the length of the actual argument.