From 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Sun, 7 Apr 2024 13:41:34 -0500 Subject: new repository --- devdocs/c/numeric%2Fmath%2Fisnormal.html | 42 ++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 devdocs/c/numeric%2Fmath%2Fisnormal.html (limited to 'devdocs/c/numeric%2Fmath%2Fisnormal.html') diff --git a/devdocs/c/numeric%2Fmath%2Fisnormal.html b/devdocs/c/numeric%2Fmath%2Fisnormal.html new file mode 100644 index 00000000..0a2a19cd --- /dev/null +++ b/devdocs/c/numeric%2Fmath%2Fisnormal.html @@ -0,0 +1,42 @@ +

isnormal

Defined in header <math.h> 
#define isnormal(arg) /* implementation defined */
+		 (since C99)

Determines if the given floating point number arg is normal, i.e. is neither zero, subnormal, infinite, nor NaN. The macro returns an integral value.

+

FLT_EVAL_METHOD is ignored: even if the argument is evaluated with more range and precision than its type, it is first converted to its semantic type, and the classification is based on that.

+

Parameters

+ +
arg - floating point value

Return value

Nonzero integral value if arg is normal, ​0​ otherwise.

+

Example

#include <stdio.h>
+#include <math.h>
+#include <float.h>
+ 
+int main(void)
+{
+    printf("isnormal(NAN)         = %d\n", isnormal(NAN));
+    printf("isnormal(INFINITY)    = %d\n", isnormal(INFINITY));
+    printf("isnormal(0.0)         = %d\n", isnormal(0.0));
+    printf("isnormal(DBL_MIN/2.0) = %d\n", isnormal(DBL_MIN/2.0));
+    printf("isnormal(1.0)         = %d\n", isnormal(1.0));
+}

Output:

+
isnormal(NAN)         = 0
+isnormal(INFINITY)    = 0
+isnormal(0.0)         = 0
+isnormal(DBL_MIN/2.0) = 0
+isnormal(1.0)         = 1

References

See also

+ + + + +
+
(C99)
 classifies the given floating-point value
(function macro)
+
(C99)
 checks if the given number has finite value
(function macro)
+
(C99)
 checks if the given number is infinite
(function macro)
+
(C99)
 checks if the given number is NaN
(function macro)
C++ documentation for isnormal
+

+ © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
+ https://en.cppreference.com/w/c/numeric/math/isnormal +

+
-- cgit v1.2.3