forked from rosh/MQL5Book
43 lines
1.6 KiB
MQL5
43 lines
1.6 KiB
MQL5
 | //+------------------------------------------------------------------+
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//| MathAbs.mq5 |
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//| Copyright 2021, MetaQuotes Ltd. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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#define PRT(A) Print(#A, "=", (A))
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//+------------------------------------------------------------------+
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//| Script program start function |
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//+------------------------------------------------------------------+
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void OnStart()
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{
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double x = 123.45;
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double y = -123.45;
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int i = -1;
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PRT(MathAbs(x)); // 123.45, kept "as is"
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PRT(MathAbs(y)); // 123.45, negative sign is gone
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PRT(MathAbs(i)); // 1, int is handled natively
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int k = MathAbs(i); // no warning: ints are used both for input/result
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// need to convert double to long
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long j = MathAbs(x); // possible loss of data due to type conversion
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// need to convert 4-byte int to 2-byte short
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short c = MathAbs(i); // possible loss of data due to type conversion
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// compare casting to unsigned vs taking abs
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uint u_cast = i;
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uint u_abs = MathAbs(i);
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PRT(u_cast); // 4294967295, 0xFFFFFFFF
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PRT(u_abs); // 1
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// zero can be positive or negative
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double n = 0;
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double z = i * n;
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PRT(z); // -0.0
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PRT(MathAbs(z)); // 0.0
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PRT(z == MathAbs(z)); // true
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}
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//+------------------------------------------------------------------+
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