# Less Than Equal

Available with Spatial Analyst license.

Available with Image Analyst license.

## Summary

Performs a Relational less-than-or-equal-to operation on two inputs on a cell-by-cell basis.

Returns 1 for cells where the first raster is less than or equal to the second raster and 0 where it is not.

Learn more about how the Relational Math tools work

## Illustration OutRas = LessThanEqual(InRas1, 2)

## Usage

• Two inputs are necessary for this relational evaluation to take place.

• The order of inputs is relevant for this tool.

## Syntax

`LessThanEqual(in_raster_or_constant1, in_raster_or_constant2)`
 Parameter Explanation Data Type in_raster_or_constant1 The input being tested to determine if it is less than or equal to the second input.A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To be able to specify a number for both inputs, the cell size and extent must first be set in the environment. Raster Layer; Constant in_raster_or_constant2 The input against which the first input is tested to be less than or equal to.A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To be able to specify a number for both inputs, the cell size and extent must first be set in the environment. Raster Layer; Constant

#### Return Value

 Name Explanation Data Type out_raster The output raster.The output cell values will be either integer 0 or 1, or NoData if any input cell value is NoData. Raster

## Code sample

LessThanEqual example 1 (Python window)

This example performs a Relational less-than-or-equal-to operation on two Grid rasters and outputs the result as an IMG raster.

``````import arcpy
from arcpy import env
from arcpy.ia import *
env.workspace = "C:/iapyexamples/data"
outLTE = LessThanEqual("degs", "negs")
outLTE.save("C:/iapyexamples/output/outlte.img")``````
LessThanEqual example 2 (stand-alone script)

This example performs a Relational less-than-or-equal-to operation on two Grid rasters.

``````# Name: LessThanEqual_Ex_02.py
# Description: Performs a relational less-than-equal operation on two
#              inputs on a pixel-by-pixel basis
# Requirements: Image Analyst Extension

# Import system modules
import arcpy
from arcpy import env
from arcpy.ia import *

# Set environment settings
env.workspace = "C:/iapyexamples/data"

# Set local variables
inRaster1 = "degs"
inRaster2 = "negs"

# Check out the ArcGIS Image Analyst extension license
arcpy.CheckOutExtension("ImageAnalyst")

# Execute LessThanEqual
outLTE = LessThanEqual(inRaster1, inRaster2)

# Save the output
outLTE.save("C:/iapyexamples/output/outlte")``````

## Licensing information

• Basic: Requires Image Analyst or Spatial Analyst
• Standard: Requires Image Analyst or Spatial Analyst
• Advanced: Requires Image Analyst or Spatial Analyst