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| <h4 class="subsection">9.45.7 Math Builtins</h4> |
| |
| <p><a name="index-math-builtins_002c-TIC54X-2210"></a><a name="index-TIC54X-builtin-math-functions-2211"></a><a name="index-builtin-math-functions_002c-TIC54X-2212"></a> |
| The following built-in functions may be used to generate a |
| floating-point value. All return a floating-point value except |
| ‘<samp><span class="samp">$cvi</span></samp>’, ‘<samp><span class="samp">$int</span></samp>’, and ‘<samp><span class="samp">$sgn</span></samp>’, which return an integer |
| value. |
| |
| |
| <a name="index-g_t_0040code_007b_0024acos_007d-math-builtin_002c-TIC54X-2213"></a> |
| <dl><dt><code>$acos(</code><var>expr</var><code>)</code><dd>Returns the floating point arccosine of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024asin_007d-math-builtin_002c-TIC54X-2214"></a><br><dt><code>$asin(</code><var>expr</var><code>)</code><dd>Returns the floating point arcsine of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024atan_007d-math-builtin_002c-TIC54X-2215"></a><br><dt><code>$atan(</code><var>expr</var><code>)</code><dd>Returns the floating point arctangent of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024atan2_007d-math-builtin_002c-TIC54X-2216"></a><br><dt><code>$atan2(</code><var>expr1</var><code>,</code><var>expr2</var><code>)</code><dd>Returns the floating point arctangent of <var>expr1</var> / <var>expr2</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024ceil_007d-math-builtin_002c-TIC54X-2217"></a><br><dt><code>$ceil(</code><var>expr</var><code>)</code><dd>Returns the smallest integer not less than <var>expr</var> as floating point. |
| |
| <p><a name="index-g_t_0040code_007b_0024cosh_007d-math-builtin_002c-TIC54X-2218"></a><br><dt><code>$cosh(</code><var>expr</var><code>)</code><dd>Returns the floating point hyperbolic cosine of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024cos_007d-math-builtin_002c-TIC54X-2219"></a><br><dt><code>$cos(</code><var>expr</var><code>)</code><dd>Returns the floating point cosine of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024cvf_007d-math-builtin_002c-TIC54X-2220"></a><br><dt><code>$cvf(</code><var>expr</var><code>)</code><dd>Returns the integer value <var>expr</var> converted to floating-point. |
| |
| <p><a name="index-g_t_0040code_007b_0024cvi_007d-math-builtin_002c-TIC54X-2221"></a><br><dt><code>$cvi(</code><var>expr</var><code>)</code><dd>Returns the floating point value <var>expr</var> converted to integer. |
| |
| <p><a name="index-g_t_0040code_007b_0024exp_007d-math-builtin_002c-TIC54X-2222"></a><br><dt><code>$exp(</code><var>expr</var><code>)</code><dd>Returns the floating point value e ^ <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024fabs_007d-math-builtin_002c-TIC54X-2223"></a><br><dt><code>$fabs(</code><var>expr</var><code>)</code><dd>Returns the floating point absolute value of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024floor_007d-math-builtin_002c-TIC54X-2224"></a><br><dt><code>$floor(</code><var>expr</var><code>)</code><dd>Returns the largest integer that is not greater than <var>expr</var> as |
| floating point. |
| |
| <p><a name="index-g_t_0040code_007b_0024fmod_007d-math-builtin_002c-TIC54X-2225"></a><br><dt><code>$fmod(</code><var>expr1</var><code>,</code><var>expr2</var><code>)</code><dd>Returns the floating point remainder of <var>expr1</var> / <var>expr2</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024int_007d-math-builtin_002c-TIC54X-2226"></a><br><dt><code>$int(</code><var>expr</var><code>)</code><dd>Returns 1 if <var>expr</var> evaluates to an integer, zero otherwise. |
| |
| <p><a name="index-g_t_0040code_007b_0024ldexp_007d-math-builtin_002c-TIC54X-2227"></a><br><dt><code>$ldexp(</code><var>expr1</var><code>,</code><var>expr2</var><code>)</code><dd>Returns the floating point value <var>expr1</var> * 2 ^ <var>expr2</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024log10_007d-math-builtin_002c-TIC54X-2228"></a><br><dt><code>$log10(</code><var>expr</var><code>)</code><dd>Returns the base 10 logarithm of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024log_007d-math-builtin_002c-TIC54X-2229"></a><br><dt><code>$log(</code><var>expr</var><code>)</code><dd>Returns the natural logarithm of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024max_007d-math-builtin_002c-TIC54X-2230"></a><br><dt><code>$max(</code><var>expr1</var><code>,</code><var>expr2</var><code>)</code><dd>Returns the floating point maximum of <var>expr1</var> and <var>expr2</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024min_007d-math-builtin_002c-TIC54X-2231"></a><br><dt><code>$min(</code><var>expr1</var><code>,</code><var>expr2</var><code>)</code><dd>Returns the floating point minimum of <var>expr1</var> and <var>expr2</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024pow_007d-math-builtin_002c-TIC54X-2232"></a><br><dt><code>$pow(</code><var>expr1</var><code>,</code><var>expr2</var><code>)</code><dd>Returns the floating point value <var>expr1</var> ^ <var>expr2</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024round_007d-math-builtin_002c-TIC54X-2233"></a><br><dt><code>$round(</code><var>expr</var><code>)</code><dd>Returns the nearest integer to <var>expr</var> as a floating point number. |
| |
| <p><a name="index-g_t_0040code_007b_0024sgn_007d-math-builtin_002c-TIC54X-2234"></a><br><dt><code>$sgn(</code><var>expr</var><code>)</code><dd>Returns -1, 0, or 1 based on the sign of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024sin_007d-math-builtin_002c-TIC54X-2235"></a><br><dt><code>$sin(</code><var>expr</var><code>)</code><dd>Returns the floating point sine of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024sinh_007d-math-builtin_002c-TIC54X-2236"></a><br><dt><code>$sinh(</code><var>expr</var><code>)</code><dd>Returns the floating point hyperbolic sine of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024sqrt_007d-math-builtin_002c-TIC54X-2237"></a><br><dt><code>$sqrt(</code><var>expr</var><code>)</code><dd>Returns the floating point square root of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024tan_007d-math-builtin_002c-TIC54X-2238"></a><br><dt><code>$tan(</code><var>expr</var><code>)</code><dd>Returns the floating point tangent of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024tanh_007d-math-builtin_002c-TIC54X-2239"></a><br><dt><code>$tanh(</code><var>expr</var><code>)</code><dd>Returns the floating point hyperbolic tangent of <var>expr</var>. |
| |
| <p><a name="index-g_t_0040code_007b_0024trunc_007d-math-builtin_002c-TIC54X-2240"></a><br><dt><code>$trunc(</code><var>expr</var><code>)</code><dd>Returns the integer value of <var>expr</var> truncated towards zero as |
| floating point. |
| |
| </dl> |
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