IBM Release 1.93 manual Logical Operators, Abs, Acosh, Asinh, Atanh

Also, REXX does not distinguish between integer and floating-point numbers. It isn’t that it uses floats for everything—internally REXX uses arbitrary-precision arithmetic.

3.8.2. Logical Operators

>(greater than) < (less than)

≥(greater or equal)

≤(less or equal) <> (unequal)

\ (not)

3.8.3. ABS

Returns the absolute value of <expression>.

Syntax: abs(<expression>)

3.8.4. ACOS

Returns the radian angle in [0, 2π) whose cosine is <expression>. Expressions whose values are outside [-1,1] will result in run-time errors.

Syntax: acos(<expression>)

3.8.5. ACOSH

Returns the argument in [0, ∞) whose hyperbolic cosine is <expression>. Attempting to take the hyperbolic arc-cosine of a number less than 1 will result in a run-time error.

Syntax: acosh(<expression>)

3.8.6. ASIN

Returns the radian angle in (-π, π] whose sine is <expression>.

Syntax: asin(<expression>)

3.8.7. ASINH

Returns the argument whose hyperbolic sine is <expression>. ASINH(x) is defined for all values of x.

Syntax: asinh(<expression>)

3.8.8. ATAN

Returns the radian angle in (-π/2, π/2) whose tangent is <expression>. Syntax: atan(<expression>)

3.8.9. ATANH

Returns the argument whose hyperbolic tangent is <expression>. Attempting to take the hyperbolic arctangent of a number outside (-1,1) will result in a run-time error.

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