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<=

Determines if one value is less than or equal to another.

Syntax

(a <= b ? v1 : v2)

where a, b, v1 and v2 may be expressions, but a, b not audio-rate.

Performance

In the above conditional, a and b are first compared. If the indicated relation is true (a less than or equal to b), then the conditional expression has the value of v1; if the relation is false, the expression has the value of v2.

NB.: If v1 or v2 are expressions, these will be evaluated before the conditional is determined.

In terms of binding strength, all conditional operators (i.e. the relational operators (<, etc.), and ?, and : ) are weaker than the arithmetic and logical operators (+, -, *, /, && and ||).

These are operators not opcodes. Therefore, they can be used within orchestra statements, but do not form complete statements themselves.

Examples

Here is an example of the <= operator. It uses the file lessequal.csd.

Example of the <= operator.
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<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
-odac    ;;;realtime audio out
;-iadc    ;;;uncomment -iadc if realtime audio input is needed too
; For Non-realtime ouput leave only the line below:
; -o <=.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 32
nchnls = 2
0dbfs  = 1

instr 1

kval    randomh 0, 1.2, 20              ;choose between 0 and 1.2

if kval >0 && kval<=.5 then             ;3 possible outcomes
        kvl = 1                 
elseif kval >.5 && kval<=1 then
        kvl =2
elseif kval >1 then
        kvl =3
endif

printks "random number = %f, result = %f\n", .1, kval, kvl
asig    poscil .7, 440*kvl, 1
        outs asig, asig

endin
</CsInstruments>
<CsScore>
f1 0 16384 10 1

i 1 0 5
e
</CsScore>
</CsoundSynthesizer>

Its output should include lines like this:

random number = 1.035781, result = 3.000000
random number = 0.134037, result = 1.000000
random number = 0.130742, result = 1.000000
random number = 1.002550, result = 3.000000
random number = 0.370565, result = 1.000000
random number = 0.655759, result = 2.000000
random number = 0.676154, result = 2.000000
......

See also

Conditional Values