Editing Embedded Programming Tips and Tricks for Beginners
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Latest revision | Your text | ||
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==The Equals Sign== | ==The Equals Sign== | ||
− | One of the most common mistakes | + | One of the most common mistakes new (and old) programmers make in C is the following. |
<pre> | <pre> | ||
if (MyVariable=5) | if (MyVariable=5) | ||
Line 173: | Line 173: | ||
} | } | ||
</pre> | </pre> | ||
− | The mistake here is the single equals sign. A single equals sign is used for doing an 'assignment' | + | The mistake here is the single equals sign. A single equals sign is used for doing an 'assignment' eg MyVariable=5 <br> |
+ | In the example above we want to do a 'comparison/relation' to produce a true/false answer for the if statement. | ||
+ | The operator for this is double equals. | ||
− | + | So the corrected code is | |
− | |||
− | |||
<pre> | <pre> | ||
if (MyVariable==5) | if (MyVariable==5) |