# How do you write exponential powers in FORTRAN?

## How do you write exponential powers in FORTRAN?

EXP(X) computes the base e exponential of X . The type shall be REAL(*) or COMPLEX(*) . Return value: The return value has same type and kind as X .

LOG(X) computes the natural logarithm of X , i.e. the logarithm to the base e. The type shall be REAL or COMPLEX . Return value: The return value is of type REAL or COMPLEX .

### How do you use sqrt in FORTRAN?

For example, function SQRT() accepts a REAL argument whose value must be non-negative and computes and returns the square root of the argument. Therefore, SQRT(25.0) returns the square root of 25.0 and SQRT(-1.0) would cause an error since the argument is negative.

What is EXP in computer?

In computational complexity theory, the complexity class EXPTIME (sometimes called EXP or DEXPTIME) is the set of all decision problems that are solvable by a deterministic Turing machine in exponential time, i.e., in O(2) time, where p(n) is a polynomial function of n.

## How do you write scientific notation in Fortran?

Fortran can use also scientific notation to represent real numbers. The sequence “En” attached to the end of a number, where n is an integer, means that the number is to be multiplied by 10n. Here are various ways of writing the number 12.345: 1.2345E1 , .

What is 0d0 in Fortran?

Here are some random FORTRAN FAQ that I’ve accumulated through working through code. Q: What does 0d0 mean? A: Double precision 0. First 0 is the value, D means x10 to the power of, second 0 is the exponent. ( Reference)

### How do you write LOG10 in Fortran?

LOG10(X) computes the base 10 logarithm of X . The type shall be REAL . Return value: The return value is of type REAL or COMPLEX .

What is IABS in Fortran?

iabs(I) – Absolute value of an integer I (pre-90 Fortran abs didn’t like integer arguments.) sin(x) – Returns the sine of x (x is not an integer) cos(x) – Returns the cosine of x (x is not an integer) tan(x) – Returns the tangent of x (x is not an integer)

## How do I use Fortran mods?

MOD(A,P) computes the remainder of the division of A by P. It is calculated as A – (INT(A/P) * P) . Return value: The kind of the return value is the result of cross-promoting the kinds of the arguments.

What is EXP in Fortran?

Description: EXP(X) computes the base e exponential of X . Fortran 77 and later, has overloads that are GNU extensions. Elemental function.

### How is EXP calculated?

The EXP function finds the value of the constant e raised to a given number, so you can think of the EXP function as e^(number), where e ≈ 2.718. The exponential function can be used to get the value of e by passing the number 1 as the argument.

What is format code in Fortran?

The A format code transfers character data. is an optional width (0 ≤ w) specifying the number of characters to be transferred. If w is not specified, the entire string is transferred. On output, if w is greater than the length of the string, the string is right justified.