LOGICAL Operators and Expressions . Arithmetic Operators Table below shows the arithmetic operators. Fortran has five LOGICAL operators that can only be used with expressions whose results are logical values (i.e., .TRUE. Exponentiation ** The same symbols are used for integer (INTEGER), real (REAL, DOUBLE PRECISION REAL) and complex (COMPLEX, DOUBLE PRECISION COMPLEX) arithmetic. An arithmetic expression evaluates to a single arithmetic value, and its operands have the following types. BYTE @. 4.7 Mixed Mode aritmetic. The five arithmetic operators in FORTRAN are: 1. For Fortran or any similar language, you must include the name of a variable (shorthand for a memory address) to the left of the "=" to receive the results of the operations to the right of the "=". REAL*16 (SPARC only) @. Subtraction - 3. Operands of an arithmetic operation may be a numeric constant, numeric variable or an arithmetic expression in parentheses. Arithmetic Operators The mathematical symbols that can be used in Fortran and the corresponding mathematical symbol is given in the following table. 4.2 Arithmetic operations. DOUBLE COMPLEX @. DOUBLE PRECISION. or .FALSE.All LOGICAL operators have priorities lower than arithmetic and relational operators. The following list shows the Intel Fortran arithmetic operators, from fastest to slowest: Addition (+), Subtraction (-), and Floating-point multiplication (*) Integer multiplication (*) Division (/) Exponentiation (**) Avoid Using EQUIVALENCE Statements Addition as well as subtraction in FORTRAN 77 ownership the same familiar symbols + moreover to - . The operators for an arithmetic expression are any of the following: . Since I am not experienced in the programming language Fortran in my example I came across a problem where the compiler reports the following errors to me: REAL. Fortran 77 : 3. 4.8 FORTRAN 90 - PRINT statement. Division / 5. Use the exponentiation, division, and multiplication operators between exactly two operands. Simple Arithmetic Operators Operators in Fortran expressions are about what you would expect from other experiences, except perhaps exponentiation: Two operators cannot be written consecutively. precedence of arithmetic operators in Fortran 77 are (from highest to lowest): ** {exponentiation} *,/ {multiplication, division} +,- {addition, subtraction} All these operators are calculated left-to-right, except the exponentiation operator **, which has right-to-left precedence. INTEGER. @ indicates a nonstandard feature. Replacing slow arithmetic operators with faster ones should be reserved for critical code areas. The operations and their operators are listed in the Table 11.1. Multiplication * 4. LOGICAL. Arithmetic Operations FORTRAN variables and constants can be processed using operations and functions appropriate to their types. 4.5 Implicit declarations in FORTRAN. Arithmetic. 4.6 Integer division. 2. 4.3 Concept of a computer variable. 4.9 Design and setup of a complete program The arithmetic operators are +,- plus and minus *,/ multiply and divide ** exponentiation (raise to the power) () brackets The order of precedence in FORTRAN is identical to that of mathematics. Fortran provides for all the basic Arithmetic operations. Arithmetic Expressions. Table: Arithmetic Operators. 4.4 Declaration statements. But here the rules are slightly different from standard BODMAS. COMPLEX*32 (SPARC only) @. The arithmetic operations on complex numbers are all represented by the same operators as for the REAL or INTEGER numbers. The basic arithmetic operations of addition, subtraction, multiplication, division, & exponentiation (raising to the power) are all possible in FORTRAN 77. Operations must be defined in a particular sequence as is done in a simple mathematics using BODMAS rule. 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