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Basic Arithmetic Operations
x =: 5 + 3 NB. Addition
y =: 10 - 4 NB. Subtraction
z =: 6 * 7 NB. Multiplication
w =: 8 % 2 NB. Division
echo x, y, z, w NB. Output all results
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Creating and Accessing Arrays
arr =: 1 2 3 4 5 NB. Create a simple array
secondElement =: 2 { arr NB. Access the second element (indexing starts at 0)
echo arr, secondElement NB. Output the array and the accessed element
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Functions
double =: * & 2 NB. Define a function to double its input
result =: double 5 NB. Call the function
echo result NB. Output the result
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Control Structures (if-then-else)
num =: 3 : 0
if. y > 5 do. 'Greater'
else. 'Not Greater'
end.
)
result =: num 10
echo result NB. Output the result
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Loops (Using a For Loop)
List =: 3 : 0
for_i. y do.
echo i NB. Output each value from 0 to 4
end.
)
List 0 1 2 3 4
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Defining and Using a Simple Matrix
matrix =: 3 3 $ 1 2 3 4 5 6 7 8 9 NB. Create a 3x3 matrix
echo matrix NB. Output the matrix
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Conditional Logic
result =: (>: & 3) NB. Use conditional logic. Results in 1 if true, 0 if false.
echo result 3
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Date and Time
current_date =: 6!:0 '' NB. Get the current date
echo current_date NB. Output the current date
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Reading Input from User
echo 'Enter your name: '
read =: 1!:1 NB. read becomes a verb to read from file
name =: read 1
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Generating Random Numbers
randomNumbers =: ?. 5$10 NB. Generate 5 random numbers between 0 and 9, including 0 and 9
echo randomNumbers NB. Output the random numbers
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Working with Lists
list =: 10 20 30 40 50 NB. Create a list
sumList =: +/ list NB. Sum of the list elements
echo sumList NB. Output the sum
J Examples