<=
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## <=

<= — 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 18. 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
    ; Audio out   Audio in
    -odac           -iadc    ;;;RT audio I/O
    ; For Non-realtime ouput leave only the line below:
    ; -o lessequal.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

    ; Initialize the global variables.
    sr = 44100
    kr = 44100
    ksmps = 1
    nchnls = 1

    ; Instrument #1.
    instr 1
      ; Get the 4th p-field from the score.
      k1 =  p4

      ; Is it less than or equal to 3? (1 = true, 0 = false)
      k2 = (p4 <= 3 ? 1 : 0)

      ; Print the values of k1 and k2.
      printks "k1 = %f, k2 = %f\\n", 1, k1, k2
    endin

    </CsInstruments>
    <CsScore>

    ; Call Instrument #1 with a p4 = 2.
    i 1 0 0.5 2
    ; Call Instrument #1 with a p4 = 3.
    i 1 1 0.5 3
    ; Call Instrument #1 with a p4 = 4.
    i 1 2 0.5 4
    e

    </CsScore>
    </CsoundSynthesizer>

Its output should include lines like this:

    k1 = 2.000000, k2 = 1.000000
    k1 = 3.000000, k2 = 1.000000
    k1 = 4.000000, k2 = 0.000000

## See Also

==, >=, >, <, !=

## Credits

Example written by Kevin Conder.

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