Examples — PseudoFlow

Iteration

Factorial

Calculate the factorial of a number using a for loop (repeat).

declare n, fact
print "Enter n:"
read n
fact = 1
repeat (for i = 1 until n steps 1)
    fact = fact * i
endrepeat
print "Factorial: " + fact

Conditionals

Maximum of N Numbers

Find the largest number among N inputs using if-else comparisons.

declare n, max
print "How many numbers?"
read n
declare num
repeat (for i = 1 until n steps 1)
    print "Enter number:"
    read num
    if (i == 1)
        max = num
    else
        if (num > max)
            max = num
        endif
    endif
endrepeat
print "Maximum: " + max

While Loop

Sum of Digits

Compute the sum of the digits of an integer using a while loop.

declare sum = 0, num, digit
print "Enter a number:"
read num
while (num > 0)
    digit = num % 10
    sum = sum + digit
    num = (num - digit) / 10
endwhile
print "Sum of digits: " + sum

Conditionals + Iteration

Prime Checker

Determine whether a given number is prime using a flag and a loop.

declare n, isPrime
print "Enter a number:"
read n
isPrime = 1
if (n <= 1)
    isPrime = 0
else
    repeat (for i = 2 until n / 2 steps 1)
        if (n % i == 0)
            isPrime = 0
        endif
    endrepeat
endif
if (isPrime == 1)
    print n + " is prime"
else
    print n + " is not prime"
endif

Switch Case

Day of Week

Convert a numeric day into its name using switch-case with exact value matching.

declare day
print "Enter day number (1-7):"
read day
switch (day)
    case 1:
        print "Monday"
    endcase
    case 2:
        print "Tuesday"
    endcase
    case 3:
        print "Wednesday"
    endcase
    case 4:
        print "Thursday"
    endcase
    case 5:
        print "Friday"
    endcase
    case 6:
        print "Saturday"
    endcase
    case 7:
        print "Sunday"
    endcase
endswitch

Arrays

Array Sum

Sum all elements of an array using a repeat loop and array indexing.

declare arr = [4, 7, 2, 9, 3]
declare sum = 0
repeat (for i = 0 until arr.length - 1 steps 1)
    sum = sum + arr[i]
endrepeat
print "Array sum: " + sum