##
<=

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

## Description

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 22. Example of the <= operator.**

See the sections *Real-time Audio* and *Command Line Flags* for more information on using command line flags.

<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
......