The usual way to examine data in your program is with the `print'
command (abbreviated `p'), or its synonym `inspect'. It evaluates and
prints the value of an expression of the language your program is
written in ( Using GDB with Different Languages Languages.).
`print /F EXPR'
EXPR is an expression (in the source language). By default the
value of EXPR is printed in a format appropriate to its data type;
you can choose a different format by specifying `/F', where F is a
letter specifying the format; see Output formats Output
If you omit EXPR, GDB displays the last value again (from the
"value history"; Value history Value History.). This
allows you to conveniently inspect the same value in an
A more low-level way of examining data is with the `x' command. It
examines data in memory at a specified address and prints it in a
specified format. Examining memory Memory.
If you are interested in information about types, or about how the
fields of a struct or a class are declared, use the `ptype EXP' command
rather than `print'. Examining the Symbol Table Symbols.
* Expressions Expressions
* Variables Program variables
* Arrays Artificial arrays
* Output Formats Output formats
* Memory Examining memory
* Auto Display Automatic display
* Print Settings Print settings
* Value History Value history
* Convenience Vars Convenience variables
* Registers Registers
* Floating Point Hardware Floating point hardware
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