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Runtime evaluation: Difference between revisions
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<br> 1) run-time evaluation of an internal expression, and a
<br> 2) run-time evaluation of a user-prompted expression.
<lang rexx>/*REXX program to illustrate ability to execute code written at runtime.*/▼
▲/*REXX program to illustrate ability to execute code written at runtime.*/
numeric digits 10000000
bee=51
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say 'length of result='length(?)
say ' left 50 bytes of result='left(?,50)'...'
say 'right 50 bytes of result=...'right(?,50)</lang>
▲Output [with the user entering: <tt> 2**44497 - 1 </tt> ]
<br>which happens to be the 27th Mersenne prime.
<pre style="height:35ex;overflow:scroll">
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