This topic describes the syntax, description, parameters, and return values of numeric functions. This topic also provides examples of these functions.

Item Description
Syntax `add(n1, n2)`
Description Calculates the sum of two addends.
Parameter
Return value Returns the sum of `n1 + n2`.
Example
``````n1 = add(10, 20)
n2 = sub(10, 20)
n3 = mul(10, 20)
n4 = div(10, 20)
n5 = mod(35, 20)
say(concat('n1=', n1))
say(concat('n2=', n2))
say(concat('n3=', n3))
say(concat('n4=', n4))
say(concat('n5=', n5))``````
Output:

n1=30

n2=-10

n3=200

n4=0.5

n5=15

## sub

Item Description
Syntax `sub(n1, n2)`
Description Calculates the difference between two numbers.
Parameter
• n1: the (minuend) number to be subtracted from.
• n2: the (subtrahend) number to be subtracted.
Return value Returns the difference of `n1 - n2`.
Example
``````n1 = add(10, 20)
n2 = sub(10, 20)
n3 = mul(10, 20)
n4 = div(10, 20)
n5 = mod(35, 20)
say(concat('n1=', n1))
say(concat('n2=', n2))
say(concat('n3=', n3))
say(concat('n4=', n4))
say(concat('n5=', n5))``````
Output:

n1=30

n2=-10

n3=200

n4=0.5

n5=15

## mul

Item Description
Syntax `mul(n1, n2)`
Description Calculates the product of two numbers.
Parameter
• n1: the multiplicand.
• n2: the other multiplicand.
Return value Returns the product of `n1 × n2`.
Example
``````n1 = add(10, 20)
n2 = sub(10, 20)
n3 = mul(10, 20)
n4 = div(10, 20)
n5 = mod(35, 20)
say(concat('n1=', n1))
say(concat('n2=', n2))
say(concat('n3=', n3))
say(concat('n4=', n4))
say(concat('n5=', n5))``````
Output:

n1=30

n2=-10

n3=200

n4=0.5

n5=15

## div

Item Description
Syntax `div(n1, n2)`
Description Calculates the quotient of two numbers.
Parameter
• n1: the dividend.
• n2: the divisor.
Return value Returns the quotient of `n1/n2`.
Example
``````n1 = add(10, 20)
n2 = sub(10, 20)
n3 = mul(10, 20)
n4 = div(10, 20)
n5 = mod(35, 20)
say(concat('n1=', n1))
say(concat('n2=', n2))
say(concat('n3=', n3))
say(concat('n4=', n4))
say(concat('n5=', n5))``````
Output:

n1=30

n2=-10

n3=200

n4=0.5

n5=15

## mod

Item Description
Syntax `mod(n1, n2)`
Description Calculates the remainder after division of one number by another.
Parameter
• n1: the dividend.
• n2: the divisor.
Return value Returns the remainder of `n1 % n2`.
Example
``````n1 = add(10, 20)
n2 = sub(10, 20)
n3 = mul(10, 20)
n4 = div(10, 20)
n5 = mod(35, 20)
say(concat('n1=', n1))
say(concat('n2=', n2))
say(concat('n3=', n3))
say(concat('n4=', n4))
say(concat('n5=', n5))``````
Output:

n1=30

n2=-10

n3=200

n4=0.5

n5=15

## gt

Item Description
Syntax `gt(n1, n2)`
Description Determines whether a number is greater than another one.
Parameter
• n1: the number to be compared.
• n2: the other number to be compared.
Return value If `n1 > n2`, `true` is returned. Otherwise, `false` is returned.
Example
``````if and(\$arg_num, gt(tonumber(\$arg_num), 10)) {
say('num > 10')
}
if and(\$arg_num, ge(tonumber(\$arg_num), 10)) {
say('num >= 10')
}
if and(\$arg_num, lt(tonumber(\$arg_num), 10)) {
say('num < 10')
}
if and(\$arg_num, le(tonumber(\$arg_num), 10)) {
say('num <= 10')
}``````
• Request: /path1/path2/file?num=10 Response: num <= 10 num >= 10
• Request: /path1/path2/file?num=11 Response: num > 10 num >= 10
• Request: /path1/path2/file?num=9 Response: num < 10 num <= 10

## ge

Item Description
Syntax `ge(n1, n2)`
Description Determines whether a number is greater than or equal to another one.
Parameter
• n1: the number to be compared.
• n2: the other number to be compared.
Return value If `n1 >= n2`, `true` is returned. Otherwise, `false` is returned.
Example
``````if and(\$arg_num, gt(tonumber(\$arg_num), 10)) {
say('num > 10')
}
if and(\$arg_num, ge(tonumber(\$arg_num), 10)) {
say('num >= 10')
}
if and(\$arg_num, lt(tonumber(\$arg_num), 10)) {
say('num < 10')
}
if and(\$arg_num, le(tonumber(\$arg_num), 10)) {
say('num <= 10')
}``````
• Request: /path1/path2/file?num=10 Response: num <= 10 num >= 10
• Request: /path1/path2/file?num=11 Response: num > 10 num >= 10
• Request: /path1/path2/file?num=9 Response: num < 10 num <= 10

## lt

Item Description
Syntax `lt(n1, n2)`
Description Determines whether a number is smaller than another one.
Parameter
• n1: the number to be compared.
• n2: the other number to be compared.
Return value If `n1 < n2`, `true` is returned. Otherwise, `false` is returned.
Example
``````if and(\$arg_num, gt(tonumber(\$arg_num), 10)) {
say('num > 10')
}
if and(\$arg_num, ge(tonumber(\$arg_num), 10)) {
say('num >= 10')
}
if and(\$arg_num, lt(tonumber(\$arg_num), 10)) {
say('num < 10')
}
if and(\$arg_num, le(tonumber(\$arg_num), 10)) {
say('num <= 10')
}``````
• Request: /path1/path2/file?num=10 Response: num <= 10 num >= 10
• Request: /path1/path2/file?num=11 Response: num > 10 num >= 10
• Request: /path1/path2/file?num=9 Response: num < 10 num <= 10

## le

Item Description
Syntax `le(n1, n2)`
Description Determines whether a number is smaller than or equal to another one.
Parameter
• n1: the number to be compared.
• n2: the other number to be compared.
Return value if `n1 <= n2`, `true` is returned. Otherwise, `false` is returned.
Example
``````if and(\$arg_num, gt(tonumber(\$arg_num), 10)) {
say('num > 10')
}
if and(\$arg_num, ge(tonumber(\$arg_num), 10)) {
say('num >= 10')
}
if and(\$arg_num, lt(tonumber(\$arg_num), 10)) {
say('num < 10')
}
if and(\$arg_num, le(tonumber(\$arg_num), 10)) {
say('num <= 10')
}``````
• Request: /path1/path2/file?num=10 Response: num <= 10 num >= 10
• Request: /path1/path2/file?num=11 Response: num > 10 num >= 10
• Request: /path1/path2/file?num=9 Response: num < 10 num <= 10

## floor

Item Description
Syntax `floor(n)`
Description Generates the greatest integer that is smaller than or equal to a number.
Parameter n: the number to be rounded down.
Return value Returns the greatest integer that is smaller than or equal to the number specified by`n`.
Example
``````if \$arg_num {
say(concat('ceil: ', ceil(tonumber(\$arg_num))))
say(concat('floor: ', floor(tonumber(\$arg_num))))
}``````

Request: /path1/path2/file?num=9.3 Response: ceil: 10 floor: 9.

## ceil

Syntax `ceil(n)`
Return value Returns the smallest integer that is greater than or equal to the number specified by`n`.
``````if \$arg_num {