30 lines
1.3 KiB
Plaintext
30 lines
1.3 KiB
Plaintext
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\b;Conditions
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A condition is a special \l;expression\u cbot\expr; that returns a \l;boolean\u cbot\bool; value, that can only be either \c;\l;true\u cbot\true;\n; or \c;\l;false\u cbot\false;\n;. With a condition, you can choose f. ex. if the instructions in a \c;\l;while\u cbot\while;\n; loop must be repeated again, or if the instruction in a \c;\l;if\u cbot\if;\n; bloc must be executed.
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Here are some operators that you can use in conditions to compare two values :
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\c;a == b \n;\c;a\n; equals \c;b\n;
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\c;a != b \n;\c;a\n; is different from \c;b\n;
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\c;a < b \n;\c;a\n; smaller than \c;b\n;
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\c;a <= b \n;\c;a\n; smaller than or equal to \c;b\n;
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\c;a > b \n;\c;a\n; greater than \c;b\n;
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\c;a >= b \n;\c;a\n; greater than or equal to \c;b\n;
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For example :
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\c;12 == 12 \n;returns true
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\c;45 != 47 \n;returns true
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\c;99 == 98 \n;returns false
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\c;12 < -1 \n;returns false
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\c;12 >= 10 \n;returns true
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\c;12 >= 12 \n;returns true
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\t;Remarque
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Be careful not to confuse the equality comparison \c;==\n; with the assignment of a \l;variable\u cbot\var; \c;=\n;.
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\c;a == b\n; is an expression that compares \c;a\n; with \c;b\n;.
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\c;a = b\n; is an expression that copies the value of \c;b\n; into \c;a\n;.
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\t;See also
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\l;Programming\u cbot;, \l;types\u cbot\type; and \l;categories\u cbot\category;.
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