Assignment 21 — function implementation

Due in class, Friday October 25

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Module triple.py

• Your module should implement the below three functions.

• A simple tester threat.py is available.

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Function inverse( n )

• Parameter n is numeric.

• Returns the additive inverse of n. The additive inverse of n is -n.

• The function does not produce output or request input.

• A run of of the tester should produce output

inverse( 4.5 ): -4.5

inverse( -12 ): 12

inverse( 0 ): 0

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Function longer( s, t )`

• Function parameters s and t are strings.

• The function returns the longer of s and t. If s and t have the same length, then s is returned.

• The function does not produce output or request input.

• A run of of the tester should produce output

longer( abcd, ef ): abcd

longer( hij, klmnnop ): klmnop

longer( str, int ): str

longer( int, str ): int

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Function summation( n )

• Function parameter n is an integer value.

• The function prints the sum of the integers.

0 + 1 + ... + n.

• The function does not produce output or request input.

• A run of of the tester should produce output

summation( 5 ): 15

summation( 1 ) : 1

summation( 0 ): 0

 

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© 2019 Jim Cohoon

Resources from previous semesters are available.