CC78K4 Datasheet, PDF (273/523 Pages) NEC – CC78K4 Ver.2.30 or Later, C Compiler Language

CHAPTER 10 LIBRARY FUNCTIONS
7-41 sqrtf
Mathematical Functions
FUNCTION
sqrtf finds the square root.
HEADER
math.h
FUNCTION PROTOTYPE
float sqrtf (float x);
Function
sqrtf
Arguments
x ... Numeric value to perform
operation
Return Value
When x ≥ 0 ... Square root of x
When x = ±0 ... ±0
When x < 0 ... NaN
EXPLANATION
• Calculates the square root of x.
• In the case of area error of x < 0, 0 is returned and EDOM is set to errno.
• If x is non-numeric, NaN is returned.
• If x is ±0, ±0 is returned.
User’s Manual U15556EJ1V0UM
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