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ARTICLE • ipow ABAP_FUNCTION
ipow - Integer Power Function
Syntax ... ipow( base = arg exp = n ) ...
Effect This function raises the argument arg passed to base to the exponent n passed to exp. The arguments arg and n are numerical expression positions. Any numeric data object can be specified for arg. n expects the type i and exponents of other types are converted to i. If the argument arg has the value 0, then the value of the exponent n must be greater than or equal to 0. The function ipow is overloaded with the effect that the return value can have different numerical types.
With the exception of an arithmetic expression, the data type of the argument arg determines the data type of the return value.
Within an arithmetic expression, the argument arg contributes to the calculation type of the entire expression and the function is calculated using the calculation type.
If the argument arg is a numeric expression, ipow functions like an arithmetic operator and the function is handled in its operand position like an arithmetic expression. This function can be specified in general and numeric expression positions. The calculation type is determined from the argument arg in the same way as with the other numerical functions. The argument n does not have any effect on the data type of the return value.
Notes
The power function ipow can replace arg ** n calculations, if the calculation type f is to be avoided. This makes sense if the type f is not precise enough.
In many cases, the power function ipow displays better performance than using the arithmetic operator **.