Determine if a string is numeric: Difference between revisions
Add SmallBASIC
(Zig version added) |
(Add SmallBASIC) |
||
Line 1,383:
You entered a number.</pre>
NB: While "99, rue de Rivoli" contains a number it is not a number entirely. The Val(v$) in this case would have stopped after it converted the "99" portion of the input, which when converted back to a string and compared to the original input would not result in an equality. 9E4 the program reads as an exponential value.
==={{header|SmallBASIC}}===
y = isnumber(s) returns true if s is a number or can be converted to a number.
<syntaxhighlight lang="qbasic">
a = 1.2345
b = "abc"
c = "-1.2345"
print isnumber(a)
print isnumber(b)
print isnumber(c)
</syntaxhighlight>
{{out}}
<pre>
1
0
1
</pre>
=={{header|Batch File}}==
| |||