switch and if-else in C

We had already seen that both if-else and switch in C can be used for decision-making in a program. Let us discuss their similarity and differences.

Similarity:

In C language, if-else, as well as the switch statement, are the decision-making statements, where an expression gets evaluated on the basis of a condition, i.e., true or false.

Differences:

• There are some things we simply cannot do with a switch. A float expression cannot be tested using a switch.
• Cases can never have variable expressions, for example, it is wrong to say ‘case a+3:‘.
• Multiple cases cannot use the same expressions.
• A switch is much more structured than if-else.
• The if-else tests for equality and logical expressions. The switch statement only tests for equality.
• if-else uses multiple statements for multiple choices, whereas, the switch uses a single expression to work with multiple choices.
• the switch statement works faster than an equivalent if-else ladder because the compiler generates a jump table for a switch during compilation.

Note: also read about  Decision-Making in C & switch Statement in C

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