how do you write c code without using if else statement or switch statement

if temp is less than 10 call TURN_ON_NCOLOR()

if temp is less less than equal to 19 call TURN_ON_RED()

Where TURN_ON_RED() turns RGB red

Below 10 F 10-19 F 20-29 F 30-39 F 40-49 F 50-59 F 60-69 F Above 70 F Off Red Green Yellow Blue Purple Cyan White